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Li S, Hou L, Huang Y, Wu W, Wu C, Zhang L. Primary salivary duct carcinoma of the lung: clinicopathological features, diagnosis and practical challenges. J Clin Pathol 2024; 77:324-329. [PMID: 36697219 DOI: 10.1136/jcp-2022-208671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 01/03/2023] [Indexed: 01/27/2023]
Abstract
AIMS To investigate the clinicopathological features, molecular characteristics and diagnostic criteria of primary salivary duct carcinoma of the lung (LSDC). METHODS We analysed the clinicopathological and molecular features of five cases of LSDC retrieved from the archives of Shanghai Pulmonary Hospital from 2020 to 2022, and reviewed the relevant literature. RESULTS All patients were men, with an average age of 66 years (age range: 49-79 years), and all lesions were central masses with a mean maximum diameter of 42.6 mm (range: 16-70 mm). Morphologically, LSDC comprised of intraductal and invasive components. Both the intraductal and invasive components of LSDC can exhibit papillary, micropapillary, cribriform, tubule structures and solid proliferation. The intraductal component can exhibit Roman bridge structures, which were usually accompanied by central comedo-like necrosis. Immunohistochemically, LSDCs consistently expressed cytokeratin (CK)7 (5 of 5) and showed variable positivity of androgen receptor (AR) (5 of 5) focally or diffusely; additionally, the tumour cells expressed human epidermal growth factor receptor 2 (HER2) (3+, n=3; 2+, n=2), GATA-binding protein 3 (3 of 5), and gross cystic disease fluid protein-15 (1 of 5), and all of which were negative for thyroid transcription factor-1, napsin A, p40, CK5/6 and p63. The residual basal/myoepithelial cells surrounding the in situ carcinoma expressed p40, CK5/6 and p63. TP53 mutation and HER2 gene amplification (3 of 5) were the most frequent genetic alterations in LSDC. All patients who underwent surgical lobectomies were alive without recurrence or metastasis. CONCLUSIONS LSDC is a highly rare malignant tumour. The distinctive architecture of in situ carcinoma and tumour cells expressing AR can provide diagnostic indications for LSDC.
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Affiliation(s)
- Shaoling Li
- Department of Pathology, Shanghai Pulmonary Hospital, School of Medicine,Tongji University, Shanghai 200433, China
| | - Likun Hou
- Department of Pathology, Shanghai Pulmonary Hospital, School of Medicine,Tongji University, Shanghai 200433, China
| | - Yan Huang
- Department of Pathology, Shanghai Pulmonary Hospital, School of Medicine,Tongji University, Shanghai 200433, China
| | - Wei Wu
- Department of Pathology, Shanghai Pulmonary Hospital, School of Medicine,Tongji University, Shanghai 200433, China
| | - Chunyan Wu
- Department of Pathology, Shanghai Pulmonary Hospital, School of Medicine,Tongji University, Shanghai 200433, China
| | - Liping Zhang
- Department of Pathology, Shanghai Pulmonary Hospital, School of Medicine,Tongji University, Shanghai 200433, China
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Joyce CM, Wakefield C, Chen-Maxwell D, Dineen S, Kenneally C, Downey P, Duffy C, O'Donoghue K, Coulter J, Fitzgerald B. Appraisal of hydatidiform mole incidence and registration rates in Ireland following the establishment of a National Gestational Trophoblastic Disease Registry. J Clin Pathol 2024:jcp-2023-209270. [PMID: 38555103 DOI: 10.1136/jcp-2023-209270] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 01/12/2024] [Indexed: 04/02/2024]
Abstract
AIMS This study aimed to re-evaluate the incidence of hydatidiform mole (HM) and determine gestational trophoblastic disease (GTD) registration rates in Ireland following the establishment of the National GTD Registry in 2017. METHODS We performed a 3-year retrospective audit of HM cases (January 2017 to December 2019) reported in our centre. In 2019, we surveyed Irish pathology laboratories to determine the number of HMs diagnosed nationally and compared this data to that recorded in the National GTD Registry. Additionally, we compared both local and national HM incidence rates to those reported internationally. RESULTS In the 3-year local audit, we identified 87 HMs among 1856 products of conception (POCs) providing a local HM incidence rate of 3.92 per 1000 births. The 1-year pathology survey recorded 170 HMs in 6008 POCs, yielding a national incidence rate of 2.86 per 1000 births. Importantly, the local HM incidence rate exceeded the national incidence rate by 37% and the local partial HM incidence (1 in 296 births) was 64% higher than the nationally incidence rate (1 in 484 births). Notably, 42% of the HM and atypical POCs diagnosed nationally were not reported to the National GTD Registry. CONCLUSIONS Our study reveals increased HM incidence rates both locally and nationally compared with previous Irish studies. The higher local PHM incidence may reflect more limited access to ploidy analysis in other pathology laboratories nationally. Significantly, almost half of the women with diagnosed or suspected HM were not registered with the National GTD Centre.
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Affiliation(s)
- Caroline M Joyce
- Pregnancy Loss Research Group, Department of Obstetrics and Gynaecology, University College Cork, Cork, Ireland
- Department of Biochemistry and Cell Biology, University College Cork, Cork, Ireland
- INFANT Research Centre, University College Cork, Cork, Ireland
| | - Craig Wakefield
- Department of Pathology, Cork University Hospital, Cork, Ireland
| | | | - Susan Dineen
- Pregnancy Loss Research Group, Department of Obstetrics and Gynaecology, University College Cork, Cork, Ireland
- Department of Pathology, Cork University Hospital, Cork, Ireland
| | - Caitriona Kenneally
- Department of Obstetrics and Gynaecology, Cork University Maternity Hospital, Cork, Ireland
| | - Paul Downey
- Department of Pathology, National Maternity Hospital, Dublin, Ireland
| | | | - Keelin O'Donoghue
- Pregnancy Loss Research Group, Department of Obstetrics and Gynaecology, University College Cork, Cork, Ireland
- INFANT Research Centre, University College Cork, Cork, Ireland
- Department of Obstetrics and Gynaecology, Cork University Maternity Hospital, Cork, Ireland
| | - John Coulter
- Department of Obstetrics and Gynaecology, Cork University Maternity Hospital, Cork, Ireland
| | - Brendan Fitzgerald
- Pregnancy Loss Research Group, Department of Obstetrics and Gynaecology, University College Cork, Cork, Ireland
- Department of Pathology, Cork University Hospital, Cork, Ireland
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Joyce CM, Dineen S, Deane J, Conlon N, O'Shea PM, Corcoran P, Coulter J, O'Donoghue K, Fitzgerald B. Novel scoring system provides high separation of diploidy and triploidy to aid partial hydatidiform mole diagnosis: an adaption of HER2 D-DISH for ploidy analysis. J Clin Pathol 2024:jcp-2023-209265. [PMID: 38555104 DOI: 10.1136/jcp-2023-209265] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 02/28/2024] [Indexed: 04/02/2024]
Abstract
AIMS Diagnosis of hydatidiform mole or molar pregnancy based on morphology alone can be challenging, particularly in early gestation, necessitating the use of ancillary techniques for accurate diagnosis. We sought to adapt the VENTANA HER2 dual-colour dual-hapten in-situ hybridisation (D-DISH) assay by using the internal chromosome 17 enumeration probe to determine ploidy status. METHODS We selected 25 products of conception, consisting of molar and non-molar cases, to validate the HER2 D-DISH assay. These cases had prior morphological assessment by a perinatal pathologist and ploidy analysis using molecular cytogenetics. Three independent observers, blinded to the original histopathological and genetic diagnosis, scored 10 representative areas on each slide. Interobserver variability was assessed by comparing the total scores of each observer using analysis of variance (ANOVA) and the kappa statistic. RESULTS Our ploidy scoring system accurately determined the correct number of diploid and triploid conceptuses, demonstrating complete concordance with pre-existing ploidy status and the initial diagnosis. Interobserver agreement between three independent scorers was robust: ANOVA (p=0.36) and kappa statistic (0.812, p<0.001). We achieved clear separation of average nuclear signals for diploid and triploid conceptuses, which was statistically significant (p<0.05). Employing our innovative scoring system, known as the 'rule of 5', we established ploidy decision thresholds for all 25 cases. CONCLUSIONS Our modified HER2 D-DISH ploidy assay simplifies the process of ploidy determination and improves the accuracy of morphological diagnosis of molar pregnancy. The HER2 D-DISH assay was selected for ploidy analysis due to the widespread availability of in-situ hybridisation in pathology laboratories.
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Affiliation(s)
- Caroline M Joyce
- Pregnancy Loss Research Group, Department of Obstetrics and Gynaecology, University College Cork, Cork, Ireland
- Bichemistry & Cell Biology, University College Cork, Cork, Ireland
| | - Susan Dineen
- Pregnancy Loss Research Group, Department of Obstetrics and Gynaecology, University College Cork, Cork, Ireland
- Department of Pathology, Cork University Hospital, Cork, Ireland
| | - Julie Deane
- Department of Pathology, Cork University Hospital, Cork, Ireland
| | - Niamh Conlon
- Department of Pathology, Cork University Hospital, Cork, Ireland
| | - Paula M O'Shea
- Department of Biochemistry & Diagnostic Endocrinology, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Paul Corcoran
- National Perinatal Epidemiology Centre, University College Cork, Cork, Ireland
| | - John Coulter
- Department of Obstetrics & Gynaecology, Cork University Maternity Hospital, Cork, Ireland
| | - Keelin O'Donoghue
- Pregnancy Loss Research Group, Department of Obstetrics and Gynaecology, University College Cork, Cork, Ireland
- Department of Obstetrics & Gynaecology, Cork University Maternity Hospital, Cork, Ireland
| | - Brendan Fitzgerald
- Pregnancy Loss Research Group, Department of Obstetrics and Gynaecology, University College Cork, Cork, Ireland
- Department of Pathology, Cork University Hospital, Cork, Ireland
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Jamwal M, Sreedharanunni S, Taak R, Singh N, Chhabra S, Kaur J, Amatya S, Sharma P, Trehan A, Das R. Non-deletional haemoglobin H (Hb H) disease morphologically masquerading as congenital dyserythropoietic anaemia type II: a diagnostic pitfall. J Clin Pathol 2024; 77:257-258. [PMID: 38123349 DOI: 10.1136/jcp-2023-209179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 12/09/2023] [Indexed: 12/23/2023]
Affiliation(s)
- Manu Jamwal
- Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Sreejesh Sreedharanunni
- Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Ravina Taak
- Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Namrata Singh
- Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Sanjeev Chhabra
- Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Jasbir Kaur
- Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Shilpa Amatya
- Pediatrics Hematology-Oncology Unit, Advanced Paediatric Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Prashant Sharma
- Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Amita Trehan
- Pediatrics Hematology-Oncology Unit, Advanced Paediatric Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Reena Das
- Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
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Windels ML, Cordier F, Van Dorpe J, Ferdinande L, Creytens D. PHOX2B: a diagnostic cornerstone in neurocristopathies and neuroblastomas. J Clin Pathol 2024:jcp-2023-209047. [PMID: 38458747 DOI: 10.1136/jcp-2023-209047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/27/2024] [Indexed: 03/10/2024]
Abstract
Paired-like homeobox 2B (PHOX2B) is a gene essential in the development of the autonomic nervous system. PHOX2B mutations are associated with neurocristopathies-Hirschsprung disease (HSCR) and congenital central hypoventilation syndrome (CCHS)-and peripheral neuroblastic tumours. PHOXB2 plays an important role in the diagnostics of these conditions.Genotyping of a PHOX2B pathogenic variant is required to establish a diagnosis of CCHS. In HSCR patients, PHOX2B immunohistochemical staining has proven to be a valuable tool in identifying this disease. Furthermore, PHOXB2 is a predisposition gene for neuroblastoma, in which PHOX2B immunohistochemical staining can be used as a highly sensitive and specific diagnostic marker. The utility of PHOX2B immunohistochemistry in pheochromocytoma and paraganglioma has also been studied but yields conflicting results.In this review, an overview is given of PHOX2B, its associated diseases and the usefulness of PHOX2B immunohistochemistry as a diagnostic tool.
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Affiliation(s)
- Mei-Lan Windels
- Department of Pathology, Ghent University Hospital, Ghent, Belgium
| | - Fleur Cordier
- Department of Pathology, Ghent University Hospital, Ghent, Belgium
| | - Jo Van Dorpe
- Department of Pathology, Ghent University Hospital, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University Hospital, Ghent University, Ghent, Belgium
| | | | - David Creytens
- Department of Pathology, Ghent University Hospital, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent University Hospital, Ghent University, Ghent, Belgium
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Balko J, Golas W, Kaspar L, Krskova L, Strnadova M, Kotis J, Zamecnik J. Novel and unusual USP6 fusion partners in aneurysmal bone cyst and their role in pathogenesis and histopathological evaluation of this disease. J Clin Pathol 2024:jcp-2023-209306. [PMID: 38429095 DOI: 10.1136/jcp-2023-209306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 02/19/2024] [Indexed: 03/03/2024]
Abstract
AIMS The purpose of this study is to report novel and unusual USP6 fusion partners in aneurysmal bone cysts (ABCs). These findings may be useful in routine diagnostics as well as in studying the biology of USP6-related disorders. METHODS A cohort of seven patients diagnosed with ABC examined between 2014 and 2023 at Motol University Hospital in Prague was included into this retrospective non-randomised study. All cases were analysed using histopathological evaluation, immunohistochemistry and Anchored multiplex RNA methods. Demographic characteristics and clinical data were also analysed. RESULTS We identified two novel (ZFX and IP6K2), three unusual (MEF2A, EIF1 and COL1A2) and two common (CDH11) fusion partners with USP6 gene among all seven cases of ABC. CONCLUSIONS Cases in our study were diagnosed as ABCs due to characteristic clinical and morphological presentation. However, not all cases are as self-evident, and molecular testing is necessary. The identification of these gene alterations can be useful in distinction between true ABC and ABC-like changes among many benign and malignant bone tumours.
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Affiliation(s)
- Jan Balko
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - William Golas
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Ludvik Kaspar
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Lenka Krskova
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Martina Strnadova
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Johana Kotis
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Josef Zamecnik
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
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Coope RJ, Pleasance S, Pandoh P, Schlosser C, Corbett RD, Marra MA. Rapid microdissection of tissue sections via laser ablation. J Clin Pathol 2024:jcp-2023-209361. [PMID: 38429092 DOI: 10.1136/jcp-2023-209361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 02/17/2024] [Indexed: 03/03/2024]
Abstract
We demonstrate a method for tissue microdissection using scanning laser ablation that is approximately two orders of magnitude faster than conventional laser capture microdissection. Our novel approach uses scanning laser optics and a slide coating under the tissue that can be excited by the laser to selectively eject regions of tissue for further processing. Tissue was dissected at 0.117 s/mm2 without reduction in yield, sequencing insert size or base quality compared with undissected tissue. From eight cases, 58-416 mm2 of tissue was obtained from one to four slides in 7-48 seconds total dissection time per case. These samples underwent exome sequencing and we found the variant allelic fraction increased in regions enriched for tumour as expected. This suggests that our ablation technique may be useful as a tool in both clinical and research labs.
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Affiliation(s)
- Robin Jn Coope
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia, Canada
| | - Stephen Pleasance
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia, Canada
| | - Pawan Pandoh
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia, Canada
| | - Colin Schlosser
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia, Canada
| | - Richard D Corbett
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia, Canada
| | - Marco A Marra
- Canada's Michael Smith Genome Sciences Centre, Vancouver, British Columbia, Canada
- Medical Genetics, The University of British Columbia, Vancouver, British Columbia, Canada
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
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Lefevre PLC, Wang Z, Teft W, Zou G, Van Viegen T, Linggi B, Jairath V, Feagan BG, Pai RK, Vande Casteele N. Identification of immune cell markers associated with ulcerative colitis histological disease activity in colonic biopsies. J Clin Pathol 2024:jcp-2023-209327. [PMID: 38418201 DOI: 10.1136/jcp-2023-209327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 02/11/2024] [Indexed: 03/01/2024]
Abstract
AIMS Accurate determination of histological activity in ulcerative colitis (UC) is essential given its diagnostic and prognostic importance. Data on the relationship between histology and immune cell markers are limited. We aimed to evaluate the association between histological disease activity and immune cell marker concentration in colonic biopsies from patients with UC. METHODS Sigmoid colon biopsies from 20 patients with UC were retrospectively assessed using the Robarts Histopathology Index (RHI). Targeted mass spectrometry determined the concentration of 18 immune cell markers (cluster of differentiation (CD) 4, CD8, CD19, CD20, CD40, CD56, CD68, CD103, forkhead box p3 (FOXP3), human leucocyte antigen, DR alpha chain (HLA-DRA), interleukin 10 (IL-10), IL-23 subunit alpha (IL-23A), IL-23 receptor (IL-23R), IL-2 receptor alpha chain (IL-2RA), Ki67, lymphocyte-activation gene 3 (LAG-3), programmed cell death protein 1 (PD-1) and PD ligand 1 (PD-L1)). The association between RHI score and immune cell marker concentration was quantified using Spearman's rank correlation coefficient (ρ) and related 95% CIs. RESULTS Fourteen of the 18 immune cell marker proteins were detected, with tissue concentration ranging from 0.003 to 11.53 fmol/µg. The overall RHI score was positively correlated with CD19, CD20, CD40, FOXP3, LAG-3, PD-1 and PD-L1 concentration (ρ=0.596-0.799) and negatively correlated with CD56 concentration (ρ=-0.460). There was no significant association between RHI score and CD4, CD8, CD68, CD103, HLA-DRA or Ki67 concentration. CONCLUSIONS This study provides insight into the correlation between immune cell marker expression and histological disease activity and the possible molecular and immunological determinants underlying microscopic disease activity in UC.
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Affiliation(s)
| | | | | | - Guangyong Zou
- Alimentiv Inc, London, Ontario, Canada
- Department of Epidemiology and Biostatistics, Western University, London, Ontario, Canada
| | | | | | - Vipul Jairath
- Alimentiv Inc, London, Ontario, Canada
- Department of Epidemiology and Biostatistics, Western University, London, Ontario, Canada
- Department of Medicine, Western University, London, Ontario, Canada
| | - Brian G Feagan
- Alimentiv Inc, London, Ontario, Canada
- Department of Epidemiology and Biostatistics, Western University, London, Ontario, Canada
- Department of Medicine, Western University, London, Ontario, Canada
| | - Rish K Pai
- Department of Laboratory Medicine & Pathology, Mayo Clinic Arizona, Scottsdale, Arizona, USA
| | - Niels Vande Casteele
- Alimentiv Inc, London, Ontario, Canada
- Department of Medicine, University of California, La Jolla, California, USA
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Lin LH, Wesseling-Rozendaal Y, Vasudevaraja V, Shen G, Black M, van Strijp D, Neerken S, van de Wiel PA, Jour G, Cotzia P, Darvishian F, Snuderl M. Increased PI3K pathway activity is associated with recurrent breast cancer in patients with low and intermediate 21-gene recurrence score. J Clin Pathol 2024:jcp-2023-209344. [PMID: 38383139 DOI: 10.1136/jcp-2023-209344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 02/08/2024] [Indexed: 02/23/2024]
Abstract
AIMS We investigated key signalling pathways' activity and mutational status of early-stage breast carcinomas with low and intermediate 21-gene recurrence score (RS) to identify molecular features that may predict recurrence. METHODS This is a retrospective case-control study of 18 patients with recurrent breast carcinoma with low and intermediate 21-gene RS (<25) and control group of 15 non-recurrent breast cancer patients. DNA and mRNA were extracted from tumour tissue. mRNA expression of genes involved in oestrogen receptor (ER), androgen receptor (AR), PI3K and MAPK signalling pathways was measured by real-time quantitative reverse transcription-qPCR (OncoSIGNal G4 test, InnoSIGN). Tumour mutational landscape was assessed by targeted DNA sequencing (Oncomine Precision Assay). RESULTS There were no statistical differences between the groups' demographic and clinicopathological characteristics. PI3K pathway showed significantly higher activity in cases compared with controls (p=0.0014). Receiver operating characteristic curve analysis showed an area under the curve of 0.79 for PI3K pathway activity in the prediction of recurrent disease in low and intermediate 21-gene RS breast cancer. There was no difference in ER, AR and MAPK pathway activity. PIK3CA alterations were the most common driver mutations, but no difference was found between the groups (p=0.46) and no association with PI3K pathway activity (p=0.86). Higher Ki67 gene expression was associated with recurrences (p=0.042) CONCLUSION: Increased PI3K pathway activity, independent of PIK3CA mutations, may play a role in the recurrence of early-stage breast cancer with low and intermediate 21-gene RS. Pathway analysis can help to identify high-risk patients in this setting.
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Affiliation(s)
- Lawrence Hsu Lin
- Department of Pathology, New York University Langone Health and Grossman School of Medicine, New York, New York, USA
| | | | - Varshini Vasudevaraja
- Department of Pathology, New York University Langone Health and Grossman School of Medicine, New York, New York, USA
| | - Guomiao Shen
- Department of Pathology, New York University Langone Health and Grossman School of Medicine, New York, New York, USA
| | - Margaret Black
- Department of Pathology, New York University Langone Health and Grossman School of Medicine, New York, New York, USA
| | | | | | | | - George Jour
- Department of Pathology, New York University Langone Health and Grossman School of Medicine, New York, New York, USA
| | - Paolo Cotzia
- Department of Pathology, New York University Langone Health and Grossman School of Medicine, New York, New York, USA
| | - Farbod Darvishian
- Department of Pathology, New York University Langone Health and Grossman School of Medicine, New York, New York, USA
| | - Matija Snuderl
- Department of Pathology, New York University Langone Health and Grossman School of Medicine, New York, New York, USA
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Mauri G, Patelli G, Roazzi L, Valtorta E, Amatu A, Marrapese G, Bonazzina E, Tosi F, Bencardino K, Ciarlo G, Mariella E, Marsoni S, Bardelli A, Bonoldi E, Sartore-Bianchi A, Siena S. Clinicopathological characterisation of MTAP alterations in gastrointestinal cancers. J Clin Pathol 2024:jcp-2023-209341. [PMID: 38350716 DOI: 10.1136/jcp-2023-209341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Accepted: 01/03/2024] [Indexed: 02/15/2024]
Abstract
BACKGROUND Methylthioadenosine phosphorylase (MTAP) is an essential metabolic enzyme in the purine and methionine salvage pathway. In cancer, MTAP gene copy number loss (MTAP loss) confers a selective dependency on the related protein arginine methyltransferase 5. The impact of MTAP alterations in gastrointestinal (GI) cancers remains unknown although hypothetically druggable. Here, we aim to investigate the prevalence, clinicopathological features and prognosis of MTAP loss GI cancers. METHODS Cases with MTAP alterations were retrieved from The Cancer Genome Atlas (TCGA) and a real-world cohort of GI cancers profiled by next-generation sequencing. If MTAP alterations other than loss were found, immunohistochemistry was performed. Finally, we set a case-control study to assess MTAP loss prognostic impact. RESULTS Findings across the TCGA dataset (N=1363 patients) and our cohort (N=508) were consistent. Gene loss was the most common MTAP alteration (9.4%), mostly co-occurring with CDKN2A/B loss (97.7%). Biliopancreatic and gastro-oesophageal cancers had the highest prevalence of MTAP loss (20.5% and 12.7%, respectively), being mostly microsatellite stable (99.2%). In colorectal cancer, MTAP loss was rare (1.1%), while most MTAP alterations were mutations (5/7, 71.4%); among the latter, only MTAP-CDKN2B truncation led to protein loss, thus potentially actionable. MTAP loss did not confer worse prognosis. CONCLUSIONS MTAP alterations are found in 5%-10% of GI cancers, most frequently biliopancreatic and gastro-oesophageal. MTAP loss is the most common alteration, identified almost exclusively in MSS, CDKN2A/B loss, upper-GI cancers. Other MTAP alterations were found in colorectal cancer, but unlikely to cause protein loss and drug susceptibility.
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Affiliation(s)
- Gianluca Mauri
- IFOM ETS - The AIRC Institute of Molecular Oncology, Milan, Italy
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
- Department of Hematology, Oncology, and Molecular Medicine, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Giorgio Patelli
- IFOM ETS - The AIRC Institute of Molecular Oncology, Milan, Italy
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
- Department of Hematology, Oncology, and Molecular Medicine, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Laura Roazzi
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
- Department of Hematology, Oncology, and Molecular Medicine, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Emanuele Valtorta
- Department of Pathology, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Alessio Amatu
- Department of Hematology, Oncology, and Molecular Medicine, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Giovanna Marrapese
- Department of Hematology, Oncology, and Molecular Medicine, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Erica Bonazzina
- Department of Hematology, Oncology, and Molecular Medicine, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Federica Tosi
- Department of Hematology, Oncology, and Molecular Medicine, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Katia Bencardino
- Department of Hematology, Oncology, and Molecular Medicine, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Gabriele Ciarlo
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
- Department of Hematology, Oncology, and Molecular Medicine, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Elisa Mariella
- IFOM ETS - The AIRC Institute of Molecular Oncology, Milan, Italy
- Department of Oncology, Molecular Biotechnology Center, University of Torino, Turin, Italy
| | - Silvia Marsoni
- IFOM ETS - The AIRC Institute of Molecular Oncology, Milan, Italy
| | - Alberto Bardelli
- IFOM ETS - The AIRC Institute of Molecular Oncology, Milan, Italy
- Department of Oncology, Molecular Biotechnology Center, University of Torino, Turin, Italy
| | - Emanuela Bonoldi
- Department of Pathology, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Andrea Sartore-Bianchi
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
- Department of Hematology, Oncology, and Molecular Medicine, Grande Ospedale Metropolitano Niguarda, Milan, Italy
- Division of Research and Innovation, Department of Hematology, Oncology, and Molecular Medicine, Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Salvatore Siena
- Department of Oncology and Hemato-Oncology, University of Milan, Milan, Italy
- Department of Hematology, Oncology, and Molecular Medicine, Grande Ospedale Metropolitano Niguarda, Milan, Italy
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11
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Wu J, Mao L, Lei W, Sun W, Yang X, Zhang Y, Huang X, Lin D. Genomic discordances and heterogeneous mutational burden, PD-L1 expression and immune infiltrates of non-small cell lung cancer metastasis. J Clin Pathol 2024:jcp-2023-209328. [PMID: 38307721 DOI: 10.1136/jcp-2023-209328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Accepted: 01/21/2024] [Indexed: 02/04/2024]
Abstract
AIMS To investigate the genomic discordances and heterogeneous mutational burden, PD-L1 expression and immune cell (IC) infiltrates of non-small cell lung cancer (NSCLC) metastasis. METHODS Surgical samples from 41 cases of NSCLC with metastatic tumours (MTs) and paired primary tumours (PTs) were collected. PD-L1 expression and ICs were quantified using image-based immunohistochemistry profiling. Whole exome sequencing was employed to explore discrepancies in genomic characteristics, tumour mutational burden (TMB) and tumour neoantigen burden (TNB) in 28 cases. RESULTS Non-synonymous mutations in MTs were slightly more than in PTs, with only 42.34% of mutations shared between paired PTs and MTs. The heterogeneity of TMB showed no significant difference (p=0.785) between MTs and PTs, while TNB significantly increased in MTs (p=0.013). MTs generally exhibited a higher density of PD-L1+ cells and a higher tumour proportion score with a lower density of IC infiltrates. Subgroup analysis considering clinicopathological factors revealed that the heterogeneity of immune biomarkers was closely associated with the histology of lung adenocarcinoma, metastatic sites of extrapulmonary, time intervals and treatment history. Prognosis analysis indicated that a high density of CD8+ T cells was a low-risk factor, whereas a high density of PD-L1+ cells in MTs was a high-risk factor for cancer-related death in metastatic NSCLC. CONCLUSIONS The mutational burden, PD-L1 expression and IC infiltrates undergo changes during NSCLC metastasis, which may impact the immunotherapeutic benefits in patients with NSCLC with metastatic progression and should be monitored according to clinical scenarios.
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Affiliation(s)
- Jianghua Wu
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Pathology, Peking University Cancer Hospital & Institute, Beijing, China
| | - Luning Mao
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Pathology, Peking University Cancer Hospital & Institute, Beijing, China
| | - Wanjun Lei
- Tianjin Medical Laboratory, BGI-Tianjin, BGI-Shenzhen, Tianjin, China
| | - Wei Sun
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Pathology, Peking University Cancer Hospital & Institute, Beijing, China
| | - Xin Yang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Pathology, Peking University Cancer Hospital & Institute, Beijing, China
| | - Yanhui Zhang
- Department of Pathology, Tianjin Medical University Cancer Institute and Hospital; National Clinical Research Center of Cancer; Key Laboratory of Cancer Prevention and Therapy; Tianjin's Clinical Research Center of Cancer, Tianjin, China
| | - Xiaozheng Huang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Pathology, Peking University Cancer Hospital & Institute, Beijing, China
| | - Dongmei Lin
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Pathology, Peking University Cancer Hospital & Institute, Beijing, China
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12
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Daungsupawong H, Wiwanitkit V. GPT-4 and histopathological image detection and classification of colorectal adenomas. J Clin Pathol 2024:jcp-2024-209405. [PMID: 38286610 DOI: 10.1136/jcp-2024-209405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 01/12/2024] [Indexed: 01/31/2024]
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13
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Gosney JR, Peake MD, Kerr KM. Improving practice in PD-L1 testing of non-small cell lung cancer in the UK: current problems and potential solutions. J Clin Pathol 2024; 77:135-139. [PMID: 36604178 PMCID: PMC10850646 DOI: 10.1136/jcp-2022-208643] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 12/20/2022] [Indexed: 01/07/2023]
Abstract
AIMS Programmed cell death ligand 1 (PD-L1) expression, used universally to predict response of non-small cell lung cancer (NSCLC) to immune-modulating drugs, is a fragile biomarker due to biological heterogeneity and challenges in interpretation. The aim of this study was to assess current PD-L1 testing practices in the UK, which may help to define strategies to improve its reliability and consistency. METHODS A questionnaire covering NSCLC PD-L1 testing practice was devised and members of the Association of Pulmonary Pathologists were invited to complete this online. RESULTS Of 44 pathologists identified as involved in PD-L1 testing, 32 (73%) responded. There was good consistency in practice and approach, but there was wide variability in the distribution of PD-L1 scoring. Although the proportions of scores falling into the three groups (negative, low and high) defined by the 1% and 50% 'cut-offs' (38%, 33% and 27%, respectively) reflect the general experience, the range within each group was wide at 23-70%, 10-60% and 15-36%, respectively. CONCLUSIONS There is inconsistency in the crucial endpoint of PD-L1 testing of NSCLC, the expression score that guides management. Addressing this requires formal networking of individuals and laboratories to devise a strategy for its reduction.
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Affiliation(s)
- John R Gosney
- Cellular Pathology, Royal Liverpool and Broadgreen Hospitals NHS Trust, Liverpool, UK
| | - Michael D Peake
- Center for Cancer Outcomes, North Central and North East London Cancer Alliances, UCLH, London, UK
- Groby Road Hospital, University of Leicester, Leicester, UK
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14
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Okada F, Takeda M, Fujii T, Uchiyama T, Sasaki S, Matsuoka M, Nitta Y, Terada C, Maebo K, Morita K, Ishida E, Sawabata N, Ohbayashi C. Clinicopathological and genetic analyses of pulmonary enteric adenocarcinoma. J Clin Pathol 2024; 77:111-115. [PMID: 36456172 DOI: 10.1136/jcp-2022-208583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 11/21/2022] [Indexed: 12/03/2022]
Abstract
AIMS Pulmonary enteric adenocarcinoma (PEAC) is a rare variant of pulmonary adenocarcinoma. Due to its rarity, few pathological and molecular studies have been performed on PEAC. We herein conducted clinicopathological, immunohistochemical and molecular analyses of PEAC with a focus on its differentiation from invasive mucinous adenocarcinoma (IMA). METHODS We examined the clinicopathological features of 16 cases of PEAC and performed a genetic analysis using next-generation sequencing (NGS). The results obtained were compared with those for IMA. RESULTS The average age of patients with PEAC (seven men and nine women) was 72.9 years. A comparison of clinical data on PEAC and IMA revealed no significant differences in age, sex or smoking history. Fifteen PEAC cases had dirty necrosis. Immunohistochemically, the positive rates for each antibody in PEAC were as follows: CK7, 88% (14/16); CK20, 81% (13/16); CDX2, 88% (14/16); p53, 69% (11/16); MUC1, 100% (16/16); MUC2, 19% (3/16); MUC5AC, 69% (11/16); MUC6, 19% (3/16). The positive rates for these antibodies in IMA were 100%, 87%, 0%, 7%, 93%, 0%, 100% and 80%, respectively. EGFR mutations, the MET exon 14 skipping mutation, BRAF mutations, the ALK fusion gene and ROS-1 fusion gene were not detected in any cases of PEAC or IMA. Among PEAC cases, NGS identified KRAS mutations in seven (44%, 7/16) and TP53 mutations in nine (56%, 9/16). Among IMA cases, the most commonly mutated gene was KRAS (90%). CONCLUSIONS The rates of dirty necrosis, immunopositivity for CDX2 and TP53 mutations were significantly higher, while that of KRAS mutations was significantly lower in PEAC cases than in IMA cases.
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Affiliation(s)
- Fumi Okada
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Maiko Takeda
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Tomomi Fujii
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Tomoko Uchiyama
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Shoh Sasaki
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Minami Matsuoka
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Yuji Nitta
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Chiyoko Terada
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Katsuya Maebo
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
| | - Kohei Morita
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
- Department of Diagnostic Pathology, Nara Prefecture General Medical Center, Nara, Japan
| | - Eiwa Ishida
- Department of Diagnostic Pathology, Nara Prefecture General Medical Center, Nara, Japan
| | - Noriyoshi Sawabata
- Department of Thoracic and Cardio-Vascular Surgery, Nara Medical University, Kashihara, Japan
| | - Chiho Ohbayashi
- Department of Diagnostic Pathology, Nara Medical University, Kashihara, Japan
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15
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Ali RH, Almanabri M, Ali NY, Alsaber AR, Khalifa NM, Hussein R, Alateeqi M, Mohammed EMA, Jama H, Almarzooq A, Benobaid N, Alqallaf Z, Ahmed AA, Bahzad S, Almurshed M. Clinicopathological analysis of BRAF and non-BRAF MAPK pathway-altered gliomas in paediatric and adult patients: a single-institution study of 40 patients. J Clin Pathol 2024:jcp-2023-209318. [PMID: 38195220 DOI: 10.1136/jcp-2023-209318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 12/28/2023] [Indexed: 01/11/2024]
Abstract
AIMS Mitogen-activated protein kinase (MAPK) pathway alteration is a major oncogenic driver in paediatric low-grade gliomas (LGG) and some adult gliomas, encompassing BRAF (most common) and non-BRAF alterations. The aim was to determine the frequency, molecular spectrum and clinicopathological features of MAPK-altered gliomas in paediatric and adult patients at our neuropathology site in Kuwait. METHODS We retrospectively searched the data of molecularly sequenced gliomas between 2018 and 2023 for MAPK alterations, revised the pathology in view of the 2021 WHO classification and evaluated the clinicopathological data for possible correlations. RESULTS Of 272 gliomas, 40 (15%) harboured a MAPK pathway alteration in 19 paediatric (median 9.6 years; 1.2-17.6) and 21 adult patients (median 37 years; 18.9-89.2), comprising 42% and 9% of paediatric and adult cases, respectively. Pilocytic astrocytoma and glioblastoma were the most frequent diagnoses in children (47%) and adults (43%), respectively. BRAF V600E (n=17, 43%) showed a wide distribution across age groups, locations and pathological diagnoses while KIAA1549::BRAF fusion (n=8, 20%) was spatially and histologically restricted to cerebellar paediatric LGGs. Non-V600E variants and BRAF amplifications accompanied other molecular aberrations in high-grade tumours. Non-BRAF MAPK alterations (n=8) included mutations and gene fusions involving FGFR1, NTRK2, NF1, ROS1 and MYB. Fusions included KANK1::NTRK2, GOPC::ROS1 (both infant hemispheric gliomas), FGFR1::TACC1 (diffuse LGG), MYB::QKI (angiocentric glioma) and BCR::NTRK2 (glioblastoma). Paradoxical H3 K27M/MAPK co-mutations were observed in two LGGs. CONCLUSION The study provided insights into MAPK-altered gliomas in Kuwait highlighting the differences among paediatric and adult patients and providing a framework for planning therapeutic polices.
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Affiliation(s)
- Rola H Ali
- Department of Pathology, College of Medicine, Kuwait University, Jabriya, Hawalli, Kuwait
- Department of Histopathology, Al Sabah Hospital, Shuwaikh, Al Asimah, Kuwait
| | - Mohamad Almanabri
- Department of Neurosurgery, Ibn Sina Hospital, Shuwaikh, Al Asimah, Kuwait
| | - Nawal Y Ali
- Department of Radiology, Ibn Sina Hospital, Shuwaikh, Al Asimah, Kuwait
| | - Ahmad R Alsaber
- Department of Management, College of Business and Economics, American University of Kuwait, Salmiya, Hawalli, Kuwait
| | - Nisreen M Khalifa
- Department of Pediatric Hematology/Oncology, NBK Children's Hospital, Shuwaikh, Al Asimah, Kuwait
| | - Rania Hussein
- Department of Radiation Oncology, Kuwait Cancer Control Center, Shuwaikh, Al Asimah, Kuwait
| | - Mona Alateeqi
- Molecular Genetics Laboratory, Kuwait Cancer Control Center, Shuwaikh, Al Asimah, Kuwait
| | - Eiman M A Mohammed
- Molecular Genetics Laboratory, Kuwait Cancer Control Center, Shuwaikh, Al Asimah, Kuwait
| | - Hiba Jama
- Molecular Genetics Laboratory, Kuwait Cancer Control Center, Shuwaikh, Al Asimah, Kuwait
| | - Ammar Almarzooq
- Molecular Genetics Laboratory, Kuwait Cancer Control Center, Shuwaikh, Al Asimah, Kuwait
| | - Noelle Benobaid
- Molecular Genetics Laboratory, Kuwait Cancer Control Center, Shuwaikh, Al Asimah, Kuwait
| | - Zainab Alqallaf
- Molecular Genetics Laboratory, Kuwait Cancer Control Center, Shuwaikh, Al Asimah, Kuwait
| | - Amir A Ahmed
- Molecular Genetics Laboratory, Kuwait Cancer Control Center, Shuwaikh, Al Asimah, Kuwait
| | - Shakir Bahzad
- Molecular Genetics Laboratory, Kuwait Cancer Control Center, Shuwaikh, Al Asimah, Kuwait
| | - Maryam Almurshed
- Department of Histopathology, Al Sabah Hospital, Shuwaikh, Al Asimah, Kuwait
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16
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Cordier F, Fadaei S, Ferdinande L, Dochy F, Vanwalleghem L, Van Den Bossche K, Loontiens S, Van der Meulen J, Van Roy N, Van Dorpe J, Creytens D. Revealing RB1 loss in an emerging entity: report of two cases of PRRX1-rearranged mesenchymal tumours. J Clin Pathol 2023:jcp-2023-209267. [PMID: 38154915 DOI: 10.1136/jcp-2023-209267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 12/07/2023] [Indexed: 12/30/2023]
Abstract
AIMS PRRX1-rearranged mesenchymal tumours are a recently identified and rare subgroup of soft tissue neoplasms with distinct morphological features and genetic alterations. This study aims to further investigate the immunohistochemical profile and underlying genetic alterations in these tumours in order to get more insight on their underlying biology and the unique profile of these tumours. METHODS Two new molecular confirmed cases of PRRX1-rearranged mesenchymal tumours were thoroughly studied with immunohistochemical stainings (RB1, CD34, ALK and pan-TRK), fluorescence in situ hybridisation (FISH) RB1/13q12 and RNA-based next-generation sequencing. RESULTS Both cases exhibited typical morphological and molecular features, confirming the diagnosis of PRRX1-rearranged mesenchymal tumours. Immunohistochemistry revealed RB1 loss in both cases, which was subsequently confirmed through FISH analysis. Additionally, one case showed focal positivity for CD34, ALK and pan-TRK on immunohistochemistry. CONCLUSIONS We identified loss of RB1 in two cases of PRRX1-rearranged mesenchymal tumours. This could suggest a potential association with RB1-deficient soft tissue tumours, although further research is necessary. Furthermore, the finding of focal positivity for CD34, ALK and pan-TRK on immunohistochemistry enriches the immunohistochemical profile of these tumours.
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Affiliation(s)
- Fleur Cordier
- Department of Pathology, Ghent University Hospital,Ghent University, Ghent, Belgium
| | - Sharareh Fadaei
- Department of Pathology, Ghent University Hospital,Ghent University, Ghent, Belgium
- Department of Pathology, AZ Sint-Jan Bruges-Ostend, Bruges, Belgium
| | - Liesbeth Ferdinande
- Department of Pathology, Ghent University Hospital,Ghent University, Ghent, Belgium
| | - Frederick Dochy
- Department of Otorhinolaryngology, head and neck surgery, AZ Sint-Jan Bruges-Ostend AV, Bruges, Belgium
| | | | | | - Siebe Loontiens
- Molecular Diagnostics Ghent University Hospital (MDG), Ghent University Hospital, Ghent University, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Joni Van der Meulen
- Molecular Diagnostics Ghent University Hospital (MDG), Ghent University Hospital, Ghent University, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Nadine Van Roy
- Molecular Diagnostics Ghent University Hospital (MDG), Ghent University Hospital, Ghent University, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Jo Van Dorpe
- Department of Pathology, Ghent University Hospital,Ghent University, Ghent, Belgium
- CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - David Creytens
- Department of Pathology, Ghent University Hospital,Ghent University, Ghent, Belgium
- CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium
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17
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Barua S, Hsiao S, Clancy E, Freeman C, Mansukhani M, Fernandes H. Quality metrics for enhanced performance of an NGS panel using single-vial amplification technology. J Clin Pathol 2023; 77:46-53. [PMID: 36376073 DOI: 10.1136/jcp-2022-208536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/17/2022] [Indexed: 11/16/2022]
Abstract
AIMS Targeted next-generation sequencing (NGS) panels, which identify genomic alterations, are the stronghold of molecular oncology laboratories. In spite of technological advances, the quantity and quality of DNA from formalin-fixed paraffin-embedded tissue and paucicellular specimens are barriers to successful sequencing. Here, we describe an NGS assay employing single tube stem-loop inhibition mediated amplification technology that delivers highly accurate results with low input DNA. Rigorous quality metrics, regular monitoring and in-depth validation make the test attractive for clinical laboratories. METHODS The study used a customised NGS panel, targeting 48 genes across several solid tumour types. Validation, in accordance with guidelines from New York State, sequenced patient samples harbouring 136 known variants, including single-nucleotide variants (SNVs) and indels. Specimen types included formalin-fixed paraffin embedded blocks, core biopsies and cytology material. Neoplastic cellularity of the tumours ranged from 10% to 80%. RESULTS The assay was highly specific and sensitive with excellent accuracy, reproducibility and repeatability/precision. Concordant results for identification of SNVs and indels were obtained from specimens with DNA input of 2-3 ng, tissue with 10% neoplastic cellularity and variant allelic frequencies of 2.5%-3%. Over 99% of the target areas are shown to achieve at least 500X coverage when parsed through two bioinformatics pipelines. With over 2000 clinical specimens analysed, the success of the panel for reporting of results is 95.3% CONCLUSIONS: The advanced technology enables accurate identification of clinically relevant variants with uniformity of coverage and an impressive turn-around-time. The overall workflow and cost-effectiveness provide added value.
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Affiliation(s)
- Subit Barua
- Department of Pathology, Anatomy and Laboratory Medicine, West Virginia University - Health Sciences Campus, Morgantown, West Virginia, USA
| | - Susan Hsiao
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York, USA
| | - Emily Clancy
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York, USA
| | - Christopher Freeman
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York, USA
| | - Mahesh Mansukhani
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York, USA
| | - Helen Fernandes
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York, USA
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18
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Abarna R, J R, Chacko G, Pai R. Droplet digital PCR (ddPCR) using FFPE DNA to assess methylation status of MGMT gene among patients with IDH mutant astrocytoma and IDH wild-type glioblastoma. J Clin Pathol 2023; 76:860-864. [PMID: 37709490 DOI: 10.1136/jcp-2023-208953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 08/21/2023] [Indexed: 09/16/2023]
Abstract
MGMT promoter methylation analysis in formalin-fixed paraffin-embedded (FFPE) tissues can be challenging since the DNA obtained is often fragmented. Bisulfite conversion, which is essential to determine methylation status, further degrades DNA. While conventional methylation-specific PCR (MSP) and pyrosequencing assays have long been used to determine the methylation status of MGMT, this study was designed to determine the utility of one-tube DNA extraction method coupled with a droplet digital PCR (ddPCR) assay, to study the epigenetic changes in the promoter region of the MGMT gene using DNA obtained from FFPE.The FFPE blocks of 30 (n=30) patients with Central Nervous System (CNS) WHO grade 4 tumours, previously tested by MSP (2011-2021) were retrieved; DNA was extracted using one-tube extraction method and bisulfite converted. All converted samples were analyzed for methylation status of the MGMT promoter region with a laboratory designed Methylation-Specific ddPCR (MS ddPCR) using degenerate primers and probes that were labelled with FAM or HEX flurocein dye.Of the 30 cases, 20 cases were MGMT methylated and 10 cases were unmethylated by MS ddPCR. The results of MS ddPCR were then compared with those obtained by MSP and found to be concordant in 93.3% (28/30) of the cases and discordant in 2 cases. The Cohen's kappa coefficient (κ) was 0.84. The sensitivity, specificity, positive predictive value and negative predictive value of the assay in detecting the methylation status was found to be 95%, 90%, 95% and 90%.The results show that MS ddPCR is a valuable tool to detect the methylation status of MGMT in FFPE with high sensitivity. This method is cost-effective and easy to perform and could be an attractive alternative to the routine method of MSP.
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Affiliation(s)
- Rajadurai Abarna
- Pathology, Christian Medical College and Hospital Vellore, Vellore, Tamil Nadu, India
| | - Ranjani J
- Pathology, Christian Medical College and Hospital Vellore, Vellore, Tamil Nadu, India
| | - Geeta Chacko
- Pathology, Christian Medical College and Hospital Vellore, Vellore, Tamil Nadu, India
| | - Rekha Pai
- Pathology, Christian Medical College and Hospital Vellore, Vellore, Tamil Nadu, India
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19
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He S, Wang B, Yi S, Huang Z, Liang L, Peng Z, Song P, Chen B, Chen F, Wei H. Molecular characterisation of Hb Akron [β52 (D3) Asp→Val] combined with thalassaemia in a Chinese family. J Clin Pathol 2023; 76:827-831. [PMID: 36104171 DOI: 10.1136/jcp-2021-208133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Accepted: 08/30/2022] [Indexed: 11/04/2022]
Abstract
AIMS Hb Akron (HBB:c.158A>T) is a rare β-chain variant and many characteristics about its clinical features still remain unclear. In this study, we aimed to explore the molecular and haematological characterisations of previously undescribed states for Hb Akron associated with different forms of thalassaemia. METHODS Haematology and genetic analysis were performed in 9 members from a Chinese Zhuang ethnic family. RESULTS Hb Akron in various combinations with β0-thalassaemia and α0-thalassaemia were identified and characterised. Simple heterozygote for Hb Akron is asymptomatic, while the compound heterozygotes of Hb Akron associated with the β0-thalassaemia mutation generates a more severe haematological phenotype than Hb Akron or β0-thalassaemia mutation seen in isolation. The specific peak of Hb Akron appears at Zone D (195-225 s) in the state of heterozygote and compound heterozygote on haemoglobin capillary electrophoresis device, and the reduction of Hb Akron level in heterozygotes is proportional to the degree of α-globin gene deficiency. CONCLUSIONS We have for the first time described the genetic and haematological characteristics of Hb Akron combined with different thalassaemia mutations, which will provide useful information for genetic counselling and prenatal diagnostic service of this mutation in a population with high prevalence of thalassaemia.
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Affiliation(s)
- Sheng He
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning, China
| | - Bolian Wang
- Department of Clinical Laboratory, Wuming Hospital Affiliated to Guangxi Medical University, Nanning, China
| | - Shang Yi
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning, China
| | - Zhenyan Huang
- Department of Clinical Laboratory, Wuming Hospital Affiliated to Guangxi Medical University, Nanning, China
| | - Lifang Liang
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning, China
| | - Zhenren Peng
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning, China
| | - Pengshu Song
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning, China
| | - Biyan Chen
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning, China
| | - Faqin Chen
- Department of Laboratory Medicine, Youjiang Medical University for Nationalities, Baise, China
| | - Hongwei Wei
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defects Prevention, Guangxi Zhuang Autonomous Region Women and Children Care Hospital, Nanning, China
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Fu X, Huang J, Fan X, Wang C, Deng W, Tan X, Chen Z, Cai Y, Hanjie L, Xu L, Zou J, Zhan H, Huang S, Fang Y, Huang Y. Head-to-head comparative study: evaluating three panels for MSI-PCR testing in patients with colorectal and gastric cancer. J Clin Pathol 2023:jcp-2023-209089. [PMID: 38053280 DOI: 10.1136/jcp-2023-209089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 11/15/2023] [Indexed: 12/07/2023]
Abstract
AIMS Due to the lack of large clinical cohorts in the Chinese populations with colorectal cancer (CRC) and gastric cancer (GC), there is no consensus among the preferred panel for microsatellite instability (MSI)-PCR testing. This study aims to evaluate a more appropriate panel. METHODS We tested the MSI status of 2572 patients with CRC and GC using the NCI panel and 2 mononucleotide panels (5 and 6 mononucleotide panels). Immunohistochemistry (IHC) was employed to perform mismatch repair protein testing in 1976 samples. RESULTS We collected 2572 patients with CRC and GC. The National Cancer Institute (NCI) panel failed to detect 13 cases. Of the 2559 cases that received results from all three panels, 2544 showed consistent results. In the remaining 15 cases, 9 showed discrepancies between MSI-H and MSI-L, and 6 showed discrepancies between MSI-L and microsatellite stability (MSS). The misdiagnosis rate of MSI-L was significantly lower in two mononucleotide panels than in the NCI panel (12.5% vs 87.5%, p=0.010) in CRC. In patients with GC, only the NCI panel detected three MSI-L cases, while the results of the two mononucleotide panels were one MSI-H and two MSS. Based on their IHC results, the MSI-L misdiagnosis rate of the NCI panel was 33.3%. Furthermore, compared with two mononucleotide panels, the NCI panel had a much lower rate of all loci instability in CRC (90.8% and 90.3% vs 25.2%) and GC (89.5% and 89.5% vs 12.0%). CONCLUSION In Chinese patients with CRC and GC, the five and six mononucleotide panels have advantages for detecting MSI over the NCI panel.
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Affiliation(s)
- Xinhui Fu
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Biomedical Innovation Center, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jinglin Huang
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xinjuan Fan
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Chao Wang
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Weihao Deng
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiaoli Tan
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zhiting Chen
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yacheng Cai
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Lin Hanjie
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Liang Xu
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jiaxin Zou
- Biomedical Innovation Center, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Department of General Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Huanmiao Zhan
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Shuhui Huang
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yongzhen Fang
- Biomedical Innovation Center, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yan Huang
- Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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21
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Mattiolo P, Wang H, Basturk O, Brosens LAA, Hong SM, Adsay V, Scarpa A, Luchini C. Comprehensive characterisation of acinar cystic transformation of the pancreas: a systematic review. J Clin Pathol 2023; 76:740-746. [PMID: 37643836 DOI: 10.1136/jcp-2023-209103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 08/16/2023] [Indexed: 08/31/2023]
Abstract
AIMS Acinar cystic transformation (ACT) of the pancreas is a rare pancreatic cystic lesion. Owing to its rarity, comprehensive histomolecular characterisation of this entity is still lacking. We aim to perform a systematic review on this controversial entity. METHODS We searched PubMed, SCOPUS and Embase through May 2023 to identify all studies on ACTs. Clinicopathological, immunohistochemical (IHC) and molecular data have been extracted and analysed. RESULTS Overall, there were 121 cases of ACTs in the literature. ACT had a female predominance (65.3% of patients), and a mean size of 4.8 cm. ACT was more often unifocal (71.9%) and multiloculate (61.2%). Histologically, the cysts were lined by an acinar epithelium, sometimes harbouring ductal-like areas (18.2%). In five cases (4.1%), an intralesional pancreatic intraepithelial neoplasia (PanIN) was reported. Preoperative diagnosis is challenging. After surgical resection, all patients were alive and disease free during follow-up except one patient who developed a second ACT after resection. By IHC, all lesions were positive for acinar markers; cytokeratin 7 and 8/18/19 were usually positive, and Ki-67 was invariably ≤3%. At the molecular level, three cases demonstrated genetic alterations: one showed multiple chromosomal gains, and other two harboured somatic mutations of KRAS and SMO genes (one mutation per case). CONCLUSIONS Globally considered, our findings demonstrated that ACT is a benign entity, without the need of surgical resection with the exception of symptomatic lesions. The rare occurrence of intracystic PanINs and driver mutations suggest considering follow-up if a preoperative diagnosis of ACT can be made.
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Affiliation(s)
- Paola Mattiolo
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, Verona, Italy
| | - Huamin Wang
- Department of Anatomical Pathology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Olca Basturk
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | | | - Seung-Mo Hong
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea (the Republic of)
| | - Volkan Adsay
- Department of Pathology, Koç University Hospital and Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey
| | - Aldo Scarpa
- Department of Diagnostics and Public Health, Section of Pathology, and ARC-Net Research Center, University and Hospital Trust of Verona, Verona, Italy
| | - Claudio Luchini
- Department of Diagnostics and Public Health, Section of Pathology, and ARC-Net Research Center, University and Hospital Trust of Verona, Verona, Italy
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22
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Omori Y, Furukawa T, Scarpa A, Luchini C. Co-occurring IPMN and pancreatic cancer: the same or different? An overview from histology to molecular pathology. J Clin Pathol 2023; 76:734-739. [PMID: 37500498 DOI: 10.1136/jcp-2023-209012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 07/18/2023] [Indexed: 07/29/2023]
Abstract
Intraductal papillary mucinous neoplasm (IPMN) of the pancreas is one of the most well-established precursors of pancreatic cancer. Its progression to acquire invasiveness is a complex process, based on the accumulation of morphological and genetic alterations. Recent advances in DNA sequencing also showed that co-occurring IPMNs and pancreatic cancers could be totally independent, further complicating our understanding of this complex scenario. The distinction between IPMN and related pancreatic cancer vs IPMN and co-occurring-but not related-pancreatic cancer is a challenging task in routine diagnostic activity, but may have important implications for precision oncology. Of note, recent multiregional sequencing-based studies focused not only on IPMN multi-step tumourigenesis, but also on the divergent intratumoural heterogeneity of this neoplasm. Globally considered, there are three different situations in which co-occurring IPMNs and invasive carcinomas can be found in the same pancreata, indicated with different terminologies: (1) IPMN-associated carcinoma: this definition indicates a carcinoma arising from an IPMN and can be also defined as IPMN-derived carcinoma, sequential or likely related; (2) independent IPMN and invasive carcinoma: the two lesions are not related, and this situation is defined as concomitant, de novo or likely independent; (3) branch-off pathway, where an invasive carcinoma and an adjacent IPMN develop divergently in a forked fashion from a common ancestral clone. In this review, we aim at clarifying the most important nomenclature/definitions of these different situations, also providing an overview of the molecular state-of-the-art and of the clinical implications of this complex landscape.
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Affiliation(s)
- Yuko Omori
- Department of Investigative Patholgy, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Diagnostics and Public Health, Section of Pathology, University of Verona, Verona, Italy
| | - Toru Furukawa
- Department of Investigative Patholgy, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Aldo Scarpa
- Department of Diagnostics and Public Health, Section of Pathology, University of Verona, Verona, Italy
- ARC-Net Research Center, University and Hospital Trust, Verona, Italy
| | - Claudio Luchini
- Department of Diagnostics and Public Health, Section of Pathology, University of Verona, Verona, Italy
- ARC-Net Research Center, University and Hospital Trust, Verona, Italy
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23
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Brennan S, O'Neill J, Kennedy S. Verification and validation of the anti-PD-L1 antibody, Clone 22C 3 on a laboratory-developed test. J Clin Pathol 2023; 76:678-683. [PMID: 35820775 DOI: 10.1136/jclinpath-2022-208353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/02/2022] [Indexed: 11/03/2022]
Abstract
AIMS The first aim of this study is to compare and validate the performance of the programmed death receptor ligand 1 (PD-L1) IHC 22C3 pharmDx assay kit processed via Dako Omnis platform with the Dako Autostainer Link 48. The second aim is to examine the concordance of scoring by pathologists using the same immunohistochemistry (IHC) assay on the Dako Omnis platform and the Dako Autostainer Link 48. METHODS Fourty-seven formalin-fixed, paraffin-embedded tissue blocks of head and neck squamous cell carcinoma tumour were stained with the PD-L1 IHC 22C3 pharmDx assay kit processed via the Dako Autostainer Link 48 and the Dako Omnis platform. Combined positive score (CPS) was ascribed by two scoring pathologists, with discordant cases provided with an agreed score. RESULTS First, identical staining patterns were identified. Second, high agreement of PD-L1 scores when a CPS cut-off of 1 was implemented illustrated an overall agreement of 94%, positive agreement of 100% and negative agreement of 88%. Finally, results highlight an intraexaminer concordance of 89% and interexaminer concordance of 85% and 92%. CONCLUSIONS In conclusion, we propose to open for discussion the deconstruction of the current practice of a compulsory companion diagnostic test (CDT) for a particular PD-L1 immunohistochemical assay. The implementation of laboratory developed tests as an alternative to the CDT poses as a novel and readily available method to surmount limitations posed to pathology laboratories.
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Affiliation(s)
| | | | - Susan Kennedy
- Pathology, Saint Vincent's, Dublin, Ireland
- Pathology, Royal Victoria Eye and Ear Hospital, Dublin, Ireland
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24
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Cartwright A, Snowden JA, Whitehouse H, Scott S, Whitby L. Implementation of the updated NICE haematological cancers (NG47) improving outcomes guidelines across Specialist Integrated Haematological Malignancy Diagnostic Services (SIHMDS) in England: a UK NEQAS LI survey. J Clin Pathol 2023; 76:618-623. [PMID: 35508367 PMCID: PMC10447389 DOI: 10.1136/jclinpath-2021-208075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 04/13/2022] [Indexed: 11/04/2022]
Abstract
AIMS Haematological malignancies represent a diverse group of diseases with complex diagnostic requirements. National Institute for Health and Care Excellence (NICE) Haematological Cancer: Improving Outcomes Guidance was published in 2003 and updated in 2016 (NG47), providing recommendations for service delivery including Specialist Integrated Haematological Malignancy Diagnostic Services (SIHMDSs). This survey assessed the implementation of NG47 guidelines, with a specific focus on implementation in relation to laboratory SIHMDS delivery. METHODS A survey was issued to the 17 SIHMDSs identified in England. The questionnaire covered laboratory configuration, information systems, integrated reporting and multidisciplinary team (MDT) working recommendations. RESULTS In the 10 responding SIHMDS, full implementation of recommendations was not achieved. Higher levels of implementation were reported in 'colocated' services compared with 'networked' SIHMDS. Increased guideline implementation was reported with longer duration since initial establishment of a SIHMDS and for laboratory based as opposed to clinical (MDT) reporting recommendations. CONCLUSIONS Our survey highlights variable implementation of NICE guidance across SIHMDS, with likely inequity of access, standardisation and quality in haemato-oncology diagnostics. Provision of a more structured framework for guideline implementation could assist in increasing compliance to meet the goals of quality and equity of access to harmonised haemato-oncology diagnostics across the NHS in England. This would provide a basis for evaluating the clinical benefits and health economic impact of the SIHMDS model on patient care and outcomes.
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Affiliation(s)
- Ashley Cartwright
- UK NEQAS for Leucocyte Immunophenotyping, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
| | - John A Snowden
- Department of Haematology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
- Department of Oncology and Metabolism, The University of Sheffield, Sheffield, UK
| | - Helen Whitehouse
- UK NEQAS for Leucocyte Immunophenotyping, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
| | - Stuart Scott
- UK NEQAS for Leucocyte Immunophenotyping, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
| | - Liam Whitby
- UK NEQAS for Leucocyte Immunophenotyping, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
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25
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Johnson L, McCune B, Locke D, Hedvat C, Wojcik JB, Schroyer C, Yan J, Johnson K, Sanders-Cliette A, Samala S, Dillon LM, Anderson S, Shuster J. Development of a LAG-3 immunohistochemistry assay for melanoma. J Clin Pathol 2023; 76:591-598. [PMID: 35534200 PMCID: PMC10447394 DOI: 10.1136/jclinpath-2022-208254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 04/13/2022] [Indexed: 11/04/2022]
Abstract
AIMS A robust immunohistochemistry (IHC) assay was developed to detect lymphocyte-activation gene 3 (LAG-3) expression by immune cells (ICs) in tumour tissues. LAG-3 is an immuno-oncology target with demonstrable clinical benefit, and there is a need for a standardised, well-characterised assay to measure its expression. This study aims to describe LAG-3 scoring criteria and present the specificity, sensitivity, analytical precision and reproducibility of this assay. METHODS The specificity of the assay was investigated by antigen competition and with LAG3 knockout cell lines. A melanin pigment removal procedure was implemented to prevent melanin interference in IHC interpretation. Formalin-fixed paraffin-embedded (FFPE) human melanoma samples with a range of LAG-3 expression levels were used to assess the sensitivity and analytical precision of the assay with a ≥1% cut-off to determine LAG-3 positivity. Interobserver and intraobserver reproducibility were evaluated with 60 samples in intralaboratory studies and 70 samples in interlaboratory studies. RESULTS The LAG-3 IHC method demonstrated performance suitable for analysis of LAG-3 IC expression in clinical melanoma samples. The pretreatment step effectively removed melanin pigment that could interfere with interpretation. LAG-3 antigen competition and analysis of LAG3 knockout cell lines indicated that the 17B4 antibody clone binds specifically to LAG-3. The intrarun repeatability, interday, interinstrument, interoperator and inter-reagent lot reproducibility demonstrated a high scoring concordance (>95%). The interobserver and intraobserver reproducibility and overall interlaboratory and intralaboratory reproducibility also showed high scoring concordance (>90%). CONCLUSIONS We have demonstrated that the assay reliably assesses LAG-3 expression in FFPE human melanoma samples by IHC.
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Affiliation(s)
- Lori Johnson
- Labcorp Drug Development, Morrisville, North Carolina, USA
| | - Bryan McCune
- Labcorp of America, Burlington, North Carolina, USA
| | - Darren Locke
- Bristol Myers Squibb, Princeton, New Jersey, USA
| | - Cyrus Hedvat
- Bristol Myers Squibb, Princeton, New Jersey, USA
| | | | | | - Jim Yan
- Labcorp Drug Development, Morrisville, North Carolina, USA
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26
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Finall A, Murphy K, Frazer RD. Improving care of melanoma patients through efficient, integrated cellular-molecular pathology workflows using tissue samples with low tumour nuclear content. J Clin Pathol 2023; 76:612-617. [PMID: 35428674 DOI: 10.1136/jclinpath-2022-208194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 03/28/2022] [Indexed: 11/04/2022]
Abstract
AIMS The aim of this quality improvement project was to improve the turnaround time of B-raf proto-oncogene (BRAF) mutation testing in patients with malignant melanoma to support oncologists in making timely treatment decisions. METHODS This is a prospective in-house verification of the Idylla BRAF test as compared with DNA panel next-generation sequencing (NGS) performed at an external laboratory. RESULTS The Idylla BRAF test had an overall concordance of 95% compared with NGS. This was considered sufficiently good for use in patients with a poor performance status who were at risk of rapid clinical deterioration. Reliable results can be generated using the Idylla BRAF test in tissue sections with tumour neoplastic cell content below 50%. We present a multidisciplinary clinical care algorithm to support dual testing. CONCLUSIONS The Idylla BRAF test has the potential to make a significant positive impact on progression-free survival of malignant melanoma patients due to its rapid turnaround time. The Idylla BRAF test can be used as an adjunct to NGS for timely management of patients, particularly those with a poor performance status at presentation.
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Affiliation(s)
- Alison Finall
- Cellular Pathology, Swansea Bay University Health Board, Swansea, UK
- Medical School, Swansea University, Swansea, UK
| | - Kate Murphy
- Cellular and Molecular Pathology Department, Swansea Bay University Health Board, Swansea, UK
- Institute of Life Science, Swansea University, Swansea, UK
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27
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Bhardwaj N, Rohilla M, Trehan A, Bansal D, Kakkar N, Srinivasan R. MYCN amplification and International Neuroblastoma Risk Group stratification on fine-needle aspiration biopsy and their correlation to survival in neuroblastoma. J Clin Pathol 2023; 76:599-605. [PMID: 35414524 DOI: 10.1136/jclinpath-2022-208177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 03/25/2022] [Indexed: 11/03/2022]
Abstract
AIMS Risk stratification as per the International Neuroblastoma Risk Group (INRG) stratification is important for management of neuroblastoma. INRG incorporates various parameters including histological category as per the International Neuroblastoma Pathology Classification (INPC) and MYCN amplification, which were evaluated in fine needle aspiration biopsy (FNAB) samples of neuroblastoma patients to ascertain their impact in our population. METHODS This was a retrospective study including 60 neuroblastoma cases diagnosed on FNAB, staged and stratified by INRG. Mitosis Karyorrhexis Index (MKI), INPC morphological category and MYCN status by fluorescence in situ hybridisation (n=46) were evaluated and correlated to outcome. RESULTS The mean age was 29 months (21 days to 9 years) with 27 and 33 children ≥18 months; male: female ratio of 1.6: 1; INRG stage-30(M), 20(L2), 2(L1) and 2(MS); INRG-36 high-risk, 13 intermediate-risk and 11 low-risk categories, respectively. MKI was high, intermediate and low in 39, 4 and 7 cases, respectively. INPC morphological type included 2 ganglioneuroblastomas and 58 neuroblastomas, graded further as 25 undifferentiated and 33 poorly differentiated tumours. MYCN was amplified in 48% (22/46) cases and correlated with undifferentiated morphology (p=0.01). At a mean follow-up of 469 (7-835) days, 22/50 were disease free and 28/50 had relapsed/died. The overall survival correlated with age (p=0.03), stage (p=0.01), INRG group (p=0.0001) and tumour grade (p=0.036). MYCN status independently did not correlate with age (p=0.5), INRG stage (p=0.2) and overall survival (p=0.4). CONCLUSION FNAB is a complete modality for diagnosing neuroblastoma and providing all information required for risk stratification as per INRG including MKI, MYCN amplification, INPC category. Our cohort with predominant high-risk neuroblastoma cases highlights regional variation.
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Affiliation(s)
- Neha Bhardwaj
- Pathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Manish Rohilla
- Cytology & Gynecological Pathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Amita Trehan
- Department of Pediatrics (Hematology-Oncology Division), Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Deepak Bansal
- Department of Pediatrics (Hematology-Oncology Division), Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Nandita Kakkar
- Histopathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Radhika Srinivasan
- Cytology & Gynecological Pathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
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28
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Pang J, Xia H, Mi S, Zhang W, Pendrick D, Freeman C, Fernandes H, Mansukhani M, Hsiao SJ. Benchmarking bioinformatics approaches for tumour mutational burden evaluation from a large cancer panel against whole-exome sequencing. J Clin Pathol 2023; 76:276-280. [PMID: 35906043 DOI: 10.1136/jcp-2022-208385] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 07/22/2022] [Indexed: 11/03/2022]
Abstract
Tumour mutational burden (TMB) is used to predict response to immunotherapies. Although several groups have proposed calculation methods for TMB, a clear consensus has not yet emerged. In this study, we explored TMB calculation approaches with a 586-gene cancer panel (1.75 Mb) benchmarked to TMB measured by whole-exome sequencing (WES), using 30 samples across a range of tumour types. We explored variant allelic fraction (VAF) cut-offs of 5% and 10%, population database filtering at 0.001, 0.0001 and 0.000025, as well as different combinations of synonymous, insertion/deletion and intronic (splice site) variants, as well as exclusion of hotspot mutations, and examined the effect on TMB correlation. Good correlation (Spearman, range 0.66-0.78) between WES and panel TMB was seen across all methods evaluated. Each method of TMB calculation evaluated showed good positive per cent agreement and negative per cent agreement using 10 mutations/Mb as a cut-off, suggesting that multiple TMB calculation approaches may yield comparable results.
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Affiliation(s)
- Jiuhong Pang
- Pathology and Cell Biology, Columbia University Irving Medical Center, New York City, New York, USA
| | - Hongai Xia
- Pathology and Cell Biology, Columbia University Irving Medical Center, New York City, New York, USA
| | - Shijun Mi
- Pathology and Cell Biology, Columbia University Irving Medical Center, New York City, New York, USA
| | - Wen Zhang
- Pathology and Cell Biology, Columbia University Irving Medical Center, New York City, New York, USA
| | - Danielle Pendrick
- Pathology and Cell Biology, Columbia University Irving Medical Center, New York City, New York, USA
| | - Christopher Freeman
- Pathology and Cell Biology, Columbia University Irving Medical Center, New York City, New York, USA
| | - Helen Fernandes
- Pathology and Cell Biology, Columbia University Irving Medical Center, New York City, New York, USA
| | - Mahesh Mansukhani
- Pathology and Cell Biology, Columbia University Irving Medical Center, New York City, New York, USA
| | - Susan J Hsiao
- Pathology and Cell Biology, Columbia University Irving Medical Center, New York City, New York, USA
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29
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de Boer M, Verschuur-Maes AHJ, Moelans C, van Diest PJ. Papillomatous breast lesions with atypical columnar cell features. J Clin Pathol 2023; 76:228-233. [PMID: 36693714 DOI: 10.1136/jcp-2022-208389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 12/29/2022] [Indexed: 01/26/2023]
Abstract
AIMS Columnar cell lesions (CCLs) are recognised breast cancer precursor lesions. Intraductal papillomas are usually lined by benign (polyclonal) cells. Although papillomas with monoclonal lesions (atypical ductal hyperplasia (ADH)/ductal carcinoma in situ (DCIS)) have been described, CCLs have not been described in papillomas. METHODS We present two papillary breast lesions lined by a single layer of luminal cells resembling atypical CCL/flat epithelial atypia (FEA). We compared these two lesions with 13 benign intraductal papillomas, and 2 papillomas with ADH/DCIS grade 1 features as controls were immunohistochemically stained for the oestrogen receptor alpha (oestrogen receptor) and progesterone receptors (PR), cytokeratin 5 (CK5) and cyclin D1. RESULTS Oestrogen receptor/PR expression was variable, with areas with ≥85% hormone receptor positivity in both morphologically normal papillomas and papillomas with ADH. In ADH areas, CK5 expression was seen in ≤5% of cells while cyclin D1 expression was high (>60%). The two papillary lesions with FEA were 100% oestrogen receptor and 90% cyclin D1 positive, and low on PR/CK5. There was only one morphologically normal papilloma with similar areas of low CK5 (5%) and high cyclin D1 expression; in all other morphologically benign papillomas CK5 expression varied between 10% and 50% and cyclin D1 expression was ≤50%. The papillary lesion with FEA that could be tested showed 16q losses, the hallmark genetic change in low nuclear grade breast neoplasias, in contrast to nine morphologically benign papillomas that could be tested. CONCLUSION We present two papillomatous breast lesions with atypical CCL morphology and 16q loss, for which we propose the term papillary FEA.
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Affiliation(s)
- Mirthe de Boer
- Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
| | | | - Cathy Moelans
- Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Paul J van Diest
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
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30
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Kuick CH, Chen WW, Chen H, Chang KTE, Mok Y. Validation of long mononucleotide repeat markers for microsatellite instability testing in paediatric tumours. J Clin Pathol 2023; 76:214-216. [PMID: 36581446 DOI: 10.1136/jcp-2022-208692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 11/30/2022] [Indexed: 12/30/2022]
Affiliation(s)
- Chik Hong Kuick
- Department of Pathology and Laboratory Medicine, KK Women's and Children's Hospital, Singapore
| | - Wan Wan Chen
- Department of Pathology, Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Huiyi Chen
- Department of Pathology and Laboratory Medicine, KK Women's and Children's Hospital, Singapore
| | - Kenneth Tou En Chang
- Department of Pathology and Laboratory Medicine, KK Women's and Children's Hospital, Singapore .,Pathology Academic Clinical Programme, SingHealth Duke-NUS Medical School, Singapore
| | - Yingting Mok
- Department of Pathology and Laboratory Medicine, KK Women's and Children's Hospital, Singapore.,Department of Pathology, National University Health System, Singapore
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31
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Bessi S, Pepe F, Russo G, Pisapia P, Ottaviantonio M, Biancalani F, Iaccarino A, Russo M, Biancalani M, Troncone G, Malapelle U. Comparison of two next-generation sequencing-based approaches for liquid biopsy analysis in patients with non-small cell lung cancer: a multicentre study. J Clin Pathol 2023; 76:206-210. [PMID: 35701144 DOI: 10.1136/jclinpath-2022-208308] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 05/31/2022] [Indexed: 11/03/2022]
Abstract
In the era of personalised medicine, testing for an increasing number of predictive biomarkers is becoming a priority. However, tissue biopsies from these patients are oftentimes insufficient for conventional approaches, a common issue that deprives them of the clinical benefits of biomarker-directed treatments. To tackle this problem, many clinical laboratories are resorting to circulating tumour DNA (ctDNA), which is becoming increasingly appreciated as a valuable source for biomarker testing. In this context, next-generation sequencing (NGS) has become essential. Indeed, different NGS systems are able to detect several clinically relevant low-frequency hot-spot mutations simultaneously in a single run. However, their reproducibility in the analysis of ctDNA has not yet been investigated. The purpose of this study was to evaluate the reproducibility of using Illumina MiSeq and Thermo Fisher Ion S5 Plus platforms to assess pathogenic alterations in non-small cell lung cancer (NSCLC) liquid biopsy specimens. Using the in vitro diagnostic (IVD) NGS panel Myriapod NGS Cancer panel DNA (Diatech Pharmacogenetics) on MiSeq platform (Illumina), we reanalysed ctDNA extracted from a retrospective series of n=40 patients with advanced NSCLC previously tested with a custom NGS panel (SiRe) on Thermo Fisher Ion S5 Plus system. Overall, 13 out of 40 (32.5%) ctDNA samples displayed pathogenic alterations in at least two genes, namely, EGFR and KRAS A concordance rate of 100% was identified between the two methodologies in terms of sample mutational status and total number of detected variables. All NGS platforms featured a high degree of concordance.
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Affiliation(s)
- Silvia Bessi
- Departmental Structure of Oncological Molecular Pathology, Azienda USL Toscana Centro, Prato, Italy
| | - Francesco Pepe
- Public Health, University of Naples Federico II, Naples, Italy
| | - Gianluca Russo
- Public Health, University of Naples Federico II, Naples, Italy
| | | | - Marco Ottaviantonio
- Departmental Structure of Oncological Molecular Pathology, Azienda USL Toscana Centro, Prato, Italy
| | | | | | - Maria Russo
- Public Health, University of Naples Federico II, Naples, Italy
| | - Mauro Biancalani
- Morphological Diagnostic and Biomolecular Characterization Area, Complex Unit of Pathological Anatomy, Azienda USL Toscana Centro, Prato, Italy
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32
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Li Y, Zhu C, Xie H, Chen Y, Lv W, Xie X, Wang X. Molecular profile-based recommendations for postoperative adjuvant therapy in early endometrial cancer with high-intermediate or intermediate risk: a Chinese randomized phase III trial (PROBEAT). J Gynecol Oncol 2023; 34:e37. [PMID: 36659832 PMCID: PMC9995864 DOI: 10.3802/jgo.2023.34.e37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 10/17/2022] [Accepted: 12/28/2022] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND The use of molecular categorisation is shifting paradigm towards the use of molecular information to refine risk stratification in endometrial cancer (EC). To date, evidence to support molecular-guided therapies is limited to retrospective studies and secondary molecular analyses of patients receiving standard treatment. The PROBEAT study is the first randomized phase III trial to evaluate tailored adjuvant treatment based on WHO-endorsed molecular classification in Chinese EC patients. It is expected to provide a clinical decision-making tool for adjuvant treatment of patients with high-intermediate risk (HIR) or intermediate risk (IR) EC to better optimise and personalise patient care and increase relapse-free survival. METHODS The PROBEAT trial is a prospective, multicentre study led by Women's Hospital of Zhejiang University Gynaecologic Oncology Group. Recruitment started on January 24, 2022, and 590 patients with HIR or IR endometrioid EC are expected to be recruited from 13 clinical centres in China. All tumor tissues will be classified into four molecular subtypes (POLEmut, MMRd, p53abn, or NSMP) based on WHO-endorsed molecular classification. Patients will be randomly assigned at a 2:1 ratio to either experimental arm and will receive molecular profile-based adjuvant treatment (observation in the POLEmut subgroup, vaginal brachytherapy in the MMRd or NSMP subgroup, or chemoradiotherapy in the p53abn subgroup) or to standard arm and will receive preferred adjuvant radiotherapy as recommended by the recent National Comprehensive Cancer Network guidelines version 1 (2022). The primary outcome is 3-year rates of recurrence. Secondary outcomes are relapse-free survival, overall survival, adverse events and health-related cancer-specific quality of life. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT05179447.
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Affiliation(s)
- Yang Li
- Department of Gynecology and Oncology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Zhejiang Provincial Key Laboratory of Precision Diagnosis and Therapy for Major Gynecological Diseases, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Changkun Zhu
- Department of Gynecology and Oncology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Hongyu Xie
- Department of Clinical Research Center, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yaxia Chen
- Department of Gynecology and Oncology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Weiguo Lv
- Department of Gynecology and Oncology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Women's Reproductive Health Key Laboratory of Zhejiang Province, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Cancer Center, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xing Xie
- Women's Reproductive Health Key Laboratory of Zhejiang Province, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xinyu Wang
- Women's Reproductive Health Key Laboratory of Zhejiang Province, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
- Cancer Center, Zhejiang University, Hangzhou, Zhejiang, China.
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33
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Balko J, Stanek M, Krskova L, Zamecnik J. Unusual fusion gene rearrangements in patients with nodular fasciitis: a study of rare and novel USP6 fusion partners with a review of the literature. J Clin Pathol 2023:jcp-2023-208768. [PMID: 36828621 DOI: 10.1136/jcp-2023-208768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 02/15/2023] [Indexed: 02/26/2023]
Abstract
AIMS This retrospective non-randomised study aims to identify new and rare fusion partners with USP6 in the setting of nodular fasciitis. It has been proven, that nodular fasciitis can harbour different variants of USP6 fusions, which can be used in routine diagnostics and even determine the biological behaviour of the process. METHODS A total of 19 cases of nodular fasciitis examined between 2011 and 2022 at Motol University Hospital in Prague were included into this study. Next to the histopathological evaluation, all cases were assessed using immunohistochemistry, RT-PCR and Anchored multiplex RNA methods. Patient's main demographic characteristics and corresponding clinical data were also analysed. RESULTS This study presents one novel (KIF1A) and five rare examples (TMP4, SPARC, EIF5A, MIR22HG, COL1A2) of fusion partners with USP6 among 19 cases of nodular fasciitis. CONCLUSION Identification of USP6 fusion partners in nodular fasciitis helps to understand the biology of such lesions. Moreover, it can be useful in routine histopathological practice of soft-tissues diagnostics, especially in preventing possible misdiagnosis of malignancy.
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Affiliation(s)
- Jan Balko
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Martin Stanek
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Lenka Krskova
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Josef Zamecnik
- Department of Pathology and Molecular Medicine, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
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34
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Humphries MP, Bingham V, Abdullah Sidi F, Craig S, Lara B, El-Daly H, O'Doherty N, Maxwell P, Lewis C, McQuaid S, Lyness J, James J, Snead DRJ, Salto-Tellez M. Technical note on the exploration of COVID-19 in autopsy material. J Clin Pathol 2023; 76:418-423. [PMID: 36717223 DOI: 10.1136/jcp-2022-208525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 10/17/2022] [Indexed: 02/01/2023]
Abstract
Interrogation of immune response in autopsy material from patients with SARS-CoV-2 is potentially significant. We aim to describe a validated protocol for the exploration of the molecular physiopathology of SARS-CoV-2 pulmonary disease using multiplex immunofluorescence (mIF).The application of validated assays for the detection of SARS-CoV-2 in tissues, originally developed in our laboratory in the context of oncology, was used to map the topography and complexity of the adaptive immune response at protein and mRNA levels.SARS-CoV-2 is detectable in situ by protein or mRNA, with a sensitivity that could be in part related to disease stage. In formalin-fixed, paraffin-embedded pneumonia material, multiplex immunofluorescent panels are robust, reliable and quantifiable and can detect topographic variations in inflammation related to pathological processes.Clinical autopsies have relevance in understanding diseases of unknown/complex pathophysiology. In particular, autopsy materials are suitable for the detection of SARS-CoV-2 and for the topographic description of the complex tissue-based immune response using mIF.
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Affiliation(s)
- Matthew Phillip Humphries
- Precision Medicine Center of Excellence, Queen's University Belfast, Belfast, UK.,National Pathology Imaging Cooperative, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Victoria Bingham
- Precision Medicine Center of Excellence, Queen's University Belfast, Belfast, UK
| | - Fatima Abdullah Sidi
- Precision Medicine Center of Excellence, Queen's University Belfast, Belfast, UK
| | - Stephanie Craig
- Precision Medicine Center of Excellence, Queen's University Belfast, Belfast, UK
| | - Beatrize Lara
- University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
| | - Hesham El-Daly
- University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
| | | | - Perry Maxwell
- Northern Ireland Molecular Pathology Laboratory, Queen's University Belfast, Belfast, UK
| | - Claire Lewis
- The Patrick G Johnston Centre for Cancer Research, Queen's University, Northern Ireland Biobank, Belfast, UK
| | - Stephen McQuaid
- The Patrick G Johnston Centre for Cancer Research, Queen's University, Northern Ireland Biobank, Belfast, UK
| | - James Lyness
- Northern Ireland State Pathologist's Department, Belfast, UK
| | - Jacqueline James
- The Patrick G Johnston Centre for Cancer Research, Queen's University, Northern Ireland Biobank, Belfast, UK
| | - David R J Snead
- Pathology, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK
| | - Manuel Salto-Tellez
- Precision Medicine Center of Excellence, Queen's University Belfast, Belfast, UK .,Division of Molecular Pathology, The Institute of Cancer Research, London, UK
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35
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Abstract
PTEN is a well-known tumour suppressor protein that is frequently found to be mutated, inactivated or deleted in a wide range of different cancers. Its tumour suppressive properties result predominantly from its inhibitory effects on the PI3K-AKT signalling pathway. In melanoma, numerous different PTEN mutations have been identified in both melanoma cell lines and melanoma tissue. A number of different molecules can act on PTEN to either promote its suppression of melanoma, while other molecules may antagonise PTEN to inhibit its mechanism of action against melanoma. This review will discuss how the interactions of PTEN with other molecules may have a positive or negative impact on melanoma pathogenesis, giving rise to the potential for PTEN-targeted therapies against melanoma.
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Affiliation(s)
- Furkan Akif Ince
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Artur Shariev
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Katie Dixon
- School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
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