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La Salvia A, Meyer ML, Hirsch FR, Kerr KM, Landi L, Tsao MS, Cappuzzo F. Rediscovering immunohistochemistry in lung cancer. Crit Rev Oncol Hematol 2024:104401. [PMID: 38815876 DOI: 10.1016/j.critrevonc.2024.104401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 05/23/2024] [Indexed: 06/01/2024] Open
Abstract
Several observations indicate that protein expression analysis by immunohistochemistry (IHC) remains relevant in individuals with non-small-cell lung cancer (NSCLC) when considering targeted therapy, as an early step in diagnosis and for therapy selection. Since the advent of next-generation sequencing (NGS), the role of IHC in testing for NSCLC biomarkers has been forgotten or ignored. We discuss how protein-level investigations maintain a critical role in defining sensitivity to lung cancer therapies in oncogene- and non-oncogene-addicted cases and in patients eligible for immunotherapy, suggesting that IHC testing should be reconsidered in clinical practice. We also argue how a panel of IHC tests should be considered complementary to NGS and other genomic assays. This is relevant to current clinical diagnostic practice but with potential future roles to optimize the selection of patients for innovative therapies. At the same time, strict validation of antibodies, assays, scoring systems, and intra- and interobserver reproducibility is needed.
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Affiliation(s)
- Anna La Salvia
- National Center for Drug Research and Evaluation, National Institute of Health (ISS), 00161 Rome, Italy
| | - May-Lucie Meyer
- Center for Thoracic Oncology/Tisch Cancer Institute and Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Fred R Hirsch
- Center for Thoracic Oncology/Tisch Cancer Institute and Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Keith M Kerr
- Aberdeen University School of Medicine & Aberdeen Royal Infirmary, Aberdeen, UK
| | - Lorenza Landi
- Medical Oncology, Istituto Nazionale Tumori IRCCS "Regina Elena", Rome, Italy
| | - Ming-Sound Tsao
- University Health Network, Princess Margaret Cancer Centre, Toronto, Ontario, Canada
| | - Federico Cappuzzo
- Medical Oncology, Istituto Nazionale Tumori IRCCS "Regina Elena", Rome, Italy.
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2
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Angerilli V, Fassan M, Parente P, Gullo I, Campora M, Rossi C, Sacramento ML, Pennelli G, Vanoli A, Grillo F, Mastracci L. A practical approach for PD-L1 evaluation in gastroesophageal cancer. Pathologica 2023; 115:57-70. [PMID: 36537078 PMCID: PMC10462995 DOI: 10.32074/1591-951x-836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 12/24/2022] Open
Abstract
PD-L1 is an established predictive immunohistochemical biomarker of response to immune checkpoint inhibitors. At present, PD-L1 is routinely assessed on biopsy samples of advanced gastroesophageal cancer patients before initiating first-line treatment. However, PD-L1 is still a suboptimal biomarker, due to changing cut-off values and scoring systems, interobserver and interlaboratory variability. This practical illustrated review discusses the range of staining patterns of PD-L1 and the potential pitfalls and challenges that can be encountered when evaluating PD-L1, focusing on gastric and gastroesophageal adenocarcinoma (G/GEA) and esophageal squamous cell carcinoma (ESCC).
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Affiliation(s)
- Valentina Angerilli
- Department of Medicine (DIMED), Surgical Pathology Unit, University Hospital of Padua, Padua (PD), Italy
| | - Matteo Fassan
- Department of Medicine (DIMED), Surgical Pathology Unit, University Hospital of Padua, Padua (PD), Italy
- Veneto Institute of Oncology IOV - IRCCS, Padua (PD), Italy
| | - Paola Parente
- Unit of Pathology, Fondazione IRCCS Ospedale Casa Sollievo della Sofferenza, San Giovanni Rotondo, FG, Italy
| | - Irene Gullo
- Department of Pathology, Centro Hospitalar Universitário de São João (CHUSJ), Porto, Portugal
- Department of Pathology, Faculty of Medicine of the University of Porto (FMUP), Portugal
- i3S - Instituto de Investigação e Inovação em Saúde da Universidade do Porto, Portugal
| | - Michela Campora
- Public Healthcare Trust of the Autonomous Province of Trento, Santa Chiara Hospital, Department of Laboratory Medicine, Pathology Unit, Trento, Italy
| | - Chiara Rossi
- Anatomic Pathology Unit, Department of Molecular Medicine, University of Pavia, and IRCCS San Matteo Hospital, Pavia, Italy
| | - Maria Luisa Sacramento
- Department of Pathology, Centro Hospitalar Universitário de São João (CHUSJ), Porto, Portugal
| | - Gianmaria Pennelli
- Department of Medicine (DIMED), Surgical Pathology Unit, University Hospital of Padua, Padua (PD), Italy
| | - Alessandro Vanoli
- Anatomic Pathology Unit, Department of Molecular Medicine, University of Pavia, and IRCCS San Matteo Hospital, Pavia, Italy
| | - Federica Grillo
- IRCCS Ospedale Policlinico San Martino, Genoa, Italy
- Anatomic Pathology, Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genova, Italy
| | - Luca Mastracci
- IRCCS Ospedale Policlinico San Martino, Genoa, Italy
- Anatomic Pathology, Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genova, Italy
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3
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Markham JF, Fellowes AP, Green T, Leal JL, Legaie R, Cullerne D, Morris T, John T, Solomon B, Fox SB. Predicting response to immune checkpoint blockade in NSCLC with tumour-only RNA-seq. Br J Cancer 2023; 128:1148-1154. [PMID: 36572732 PMCID: PMC10006283 DOI: 10.1038/s41416-022-02105-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 12/04/2022] [Accepted: 12/06/2022] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Targeted RNA sequencing (RNA-seq) from FFPE specimens is used clinically in cancer for its ability to estimate gene expression and to detect fusions. Using a cohort of NSCLC patients, we sought to determine whether targeted RNA-seq could be used to measure tumour mutational burden (TMB) and the expression of immune-cell-restricted genes from FFPE specimens and whether these could predict response to immune checkpoint blockade. METHODS Using The Cancer Genome Atlas LUAD dataset, we developed a method for determining TMB from tumour-only RNA-seq and showed a correlation with DNA sequencing derived TMB calculated from tumour/normal sample pairs (Spearman correlation = 0.79, 95% CI [0.73, 0.83]. We applied this method to targeted sequencing data from our patient cohort and validated these results against TMB estimates obtained using an orthogonal assay (Spearman correlation = 0.49, 95% CI [0.24, 0.68]). RESULTS We observed that the RNA measure of TMB was significantly higher in responders to immune blockade treatment (P = 0.028) and that it was predictive of response (AUC = 0.640 with 95% CI [0.493, 0.786]). By contrast, the expression of immune-cell-restricted genes was uncorrelated with patient outcome. CONCLUSION TMB calculated from targeted RNA sequencing has a similar diagnostic ability to TMB generated from targeted DNA sequencing.
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Affiliation(s)
- John F Markham
- Peter MacCallum Cancer Centre, 305 Grattan Street, Parkville, VIC, 3000, Australia
- Department of Pathology, Peter MacCallum Cancer Centre, Parkville, VIC, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Andrew P Fellowes
- Peter MacCallum Cancer Centre, 305 Grattan Street, Parkville, VIC, 3000, Australia.
- Department of Pathology, Peter MacCallum Cancer Centre, Parkville, VIC, Australia.
| | - Thomas Green
- Peter MacCallum Cancer Centre, 305 Grattan Street, Parkville, VIC, 3000, Australia
- Department of Pathology, Peter MacCallum Cancer Centre, Parkville, VIC, Australia
| | - Jose Luis Leal
- Peter MacCallum Cancer Centre, 305 Grattan Street, Parkville, VIC, 3000, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Roxane Legaie
- Peter MacCallum Cancer Centre, 305 Grattan Street, Parkville, VIC, 3000, Australia
- Department of Pathology, Peter MacCallum Cancer Centre, Parkville, VIC, Australia
| | - Darren Cullerne
- Murdoch Children's Research Institute, Flemington Road, Parkville, VIC, 3052, Australia
| | - Tessa Morris
- Southern Blood and Cancer Service, Te Whatu Ora Southern, Dunedin, New Zealand
- Mercy Cancer Care, Mercy Hospital, Dunedin, New Zealand
| | - Tom John
- Peter MacCallum Cancer Centre, 305 Grattan Street, Parkville, VIC, 3000, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Ben Solomon
- Peter MacCallum Cancer Centre, 305 Grattan Street, Parkville, VIC, 3000, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Stephen B Fox
- Peter MacCallum Cancer Centre, 305 Grattan Street, Parkville, VIC, 3000, Australia
- Department of Pathology, Peter MacCallum Cancer Centre, Parkville, VIC, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
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4
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Blaauwgeers H, Lissenberg-Witte BI, Dickhoff C, Duin S, Thunnissen E. Prognostic value of proliferation, PD-L1 and nuclear size in patients with superior sulcus tumours treated with chemoradiotherapy and surgery. J Clin Pathol 2023; 76:111-115. [PMID: 34301798 DOI: 10.1136/jclinpath-2021-207570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 07/14/2021] [Indexed: 01/24/2023]
Abstract
AIMS The aim of this study was to determine the relationship between proliferative activity, PD-L1 status and nuclear size changes after preoperative chemoradiotherapy (CRT) and the clinical outcome in patients with superior sulcus tumours. METHODS Proliferative activity (MIB-1) and PD-L1 status were estimated by immunohistochemistry in the tumour cells of resection specimen in a series of 33 patients with residual tumour after trimodality therapy for a sulcus superior tumour between 2005 and 2014. A morphometric analysis of both pretreatment and post-treatment tumour materials was also performed. Results were related to disease-free survival and overall survival. RESULTS Low proliferative activity (<20% MIB-1) was associated with better overall survival: 2-year overall survival of 73% compared with 43% and 25%, respectively, for moderate (MIB-1 20%-50%) and high (MIB-1 >50%) proliferative activity (p=0.016). A negative PD-L1 status (<1% positive tumour cells) was also associated with better overall survival (p=0.021). The mean nuclear size of normal lung tissue pneumocytes was significantly smaller compared with the mean nuclear size of tumour cells of the resection specimens (median difference -38.1; range -115.2 to 16.0; p<0.001). The mean nuclear size of tumour cells did not differ between pretreatment biopsies and resection specimens (median difference -4.6; range -75.2 to 86.7; p=0.14). Nuclear size was not associated with survival (p=0.82). CONCLUSIONS Low proliferative activity determined by MIB-1 as well as a negative PD-L1 expression are significantly associated with better overall survival in patients with residual tumour after CRT for superior sulcus tumour.
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Affiliation(s)
- Hans Blaauwgeers
- Department of Pathology, OLVG LAB BV, Amsterdam, The Netherlands
| | - Birgit I Lissenberg-Witte
- Department of Epidemiology and Data Science, Location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Chris Dickhoff
- Department of Surgery and Cardiothoracic Surgery, Amsterdam UMC - Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - Sylvia Duin
- Department of Pathology, Location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Erik Thunnissen
- Department of Pathology, Location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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5
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Lea D, Hatleskog L. Fremtidens patologi er digital. TIDSSKRIFT FOR DEN NORSKE LEGEFORENING 2022; 142:22-0155. [DOI: 10.4045/tidsskr.22.0155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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6
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Venina AR, Ivantsov AO, Iyevleva AG, Kuligina ES, Preobrazhenskaya EV, Yurlov DO, Rawlinson KE, Kosmin AV, Savelov NA, Raskin GA, Imyanitov EN. PCR-based analysis of PD-L1 RNA expression in lung cancer: comparison with commonly used immunohistochemical assays. Ann Diagn Pathol 2022; 59:151968. [DOI: 10.1016/j.anndiagpath.2022.151968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/20/2022] [Accepted: 05/02/2022] [Indexed: 11/26/2022]
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7
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Koopman B, Kuijpers CCHJ, Groen HJM, Timens W, Schuuring E, Willems SM, van Kempen LC. Detection of NTRK Fusions and TRK Expression and Performance of pan-TRK Immunohistochemistry in Routine Diagnostics: Results from a Nationwide Community-Based Cohort. Diagnostics (Basel) 2022; 12:diagnostics12030668. [PMID: 35328221 PMCID: PMC8946871 DOI: 10.3390/diagnostics12030668] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/02/2022] [Accepted: 03/04/2022] [Indexed: 02/01/2023] Open
Abstract
Gene fusions involving NTRK1, NTRK2, and NTRK3 are rare drivers of cancer that can be targeted with histology-agnostic inhibitors. This study aimed to determine the nationwide landscape of NTRK/TRK testing in the Netherlands and the usage of pan-TRK immunohistochemistry (IHC) as a preselection tool to detect NTRK fusions. All pathology reports in 2017–2020 containing the search term ‘TRK’ were retrieved from the Dutch Pathology Registry (PALGA). Patient characteristics, tumor histology, NTRK/TRK testing methods, and reported results were extracted. NTRK/TRK testing was reported for 7457 tumors. Absolute testing rates increased from 815 (2017) to 3380 (2020). Tumors were tested with DNA/RNA-based molecular assay(s) (48%), IHC (47%), or in combination (5%). A total of 69 fusions involving NTRK1 (n = 22), NTRK2 (n = 6) and NTRK3 (n = 41) were identified in tumors from adult (n = 51) and pediatric (n = 18) patients. In patients tested with both IHC and a molecular assay (n = 327, of which 29 NTRK fusion-positive), pan-TRK IHC had a sensitivity of 77% (95% confidence interval (CI), 56–91) and a specificity of 84% (95% CI, 78–88%). These results showed that pan-TRK IHC has a low sensitivity in current routine practice and warrants the introduction of quality guidelines regarding the implementation and interpretation of pan-TRK IHC.
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Affiliation(s)
- Bart Koopman
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (B.K.); (W.T.); (E.S.); (S.M.W.)
| | | | - Harry J. M. Groen
- Department of Pulmonary Diseases, University of Groningen, University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands;
| | - Wim Timens
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (B.K.); (W.T.); (E.S.); (S.M.W.)
| | - Ed Schuuring
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (B.K.); (W.T.); (E.S.); (S.M.W.)
| | - Stefan M. Willems
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (B.K.); (W.T.); (E.S.); (S.M.W.)
| | - Léon C. van Kempen
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (B.K.); (W.T.); (E.S.); (S.M.W.)
- Correspondence: ; Tel.: +31-50-361-5129
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8
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The impact of a pathologist’s personality on the interobserver variability and diagnostic accuracy of predictive PD-L1 immunohistochemistry in lung cancer. Lung Cancer 2022; 166:143-149. [DOI: 10.1016/j.lungcan.2022.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/23/2022] [Accepted: 03/02/2022] [Indexed: 12/18/2022]
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9
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Hondelink LM, Hüyük M, Postmus PE, Smit VTHBM, Blom S, von der Thüsen JH, Cohen D. Development and validation of a supervised deep learning algorithm for automated whole-slide programmed death-ligand 1 tumour proportion score assessment in non-small cell lung cancer. Histopathology 2021; 80:635-647. [PMID: 34786761 PMCID: PMC9299490 DOI: 10.1111/his.14571] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 09/08/2021] [Accepted: 09/21/2021] [Indexed: 12/24/2022]
Abstract
AIMS Immunohistochemical programmed death-ligand 1 (PD-L1) staining to predict responsiveness to immunotherapy in patients with advanced non-small cell lung cancer (NSCLC) has several drawbacks: a robust gold standard is lacking, and there is substantial interobserver and intraobserver variance, with up to 20% discordance around cutoff points. The aim of this study was to develop a new deep learning-based PD-L1 tumour proportion score (TPS) algorithm, trained and validated on a routine diagnostic dataset of digitised PD-L1 (22C3, laboratory-developed test)-stained samples. METHODS AND RESULTS We designed a fully supervised deep learning algorithm for whole-slide PD-L1 assessment, consisting of four sequential convolutional neural networks (CNNs), using aiforia create software. We included 199 whole slide images (WSIs) of 'routine diagnostic' histology samples from stage IV NSCLC patients, and trained the algorithm by using a training set of 60 representative cases. We validated the algorithm by comparing the algorithm TPS with the reference score in a held-out validation set. The algorithm had similar concordance with the reference score (79%) as the pathologists had with one another (75%). The intraclass coefficient was 0.96 and Cohen's κ coefficient was 0.69 for the algorithm. Around the 1% and 50% cutoff points, concordance was also similar between pathologists and the algorithm. CONCLUSIONS We designed a new, deep learning-based PD-L1 TPS algorithm that is similarly able to assess PD-L1 expression in daily routine diagnostic cases as pathologists. Successful validation on routine diagnostic WSIs and detailed visual feedback show that this algorithm meets the requirements for functioning as a 'scoring assistant'.
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Affiliation(s)
- Liesbeth M Hondelink
- Department of Pathology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Melek Hüyük
- Department of Pulmonology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Pieter E Postmus
- Department of Pulmonology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Vincent T H B M Smit
- Department of Pathology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Sami Blom
- Aiforia Technologies Oy, Helsinki, Finland
| | | | - Danielle Cohen
- Department of Pathology, Leiden University Medical Centre, Leiden, The Netherlands
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Pang JMB, Castles B, Byrne DJ, Button P, Hendry S, Lakhani SR, Sivasubramaniam V, Cooper WA, Armes J, Millar EK, Raymond W, Roberts-Thomson S, Kumar B, Burr M, Selinger C, Harvey K, Chan C, Beith J, Clouston D, O’Toole SA, Fox SB. SP142 PD-L1 Scoring Shows High Interobserver and Intraobserver Agreement in Triple-negative Breast Carcinoma But Overall Low Percentage Agreement With Other PD-L1 Clones SP263 and 22C3. Am J Surg Pathol 2021; 45:1108-1117. [PMID: 34232604 PMCID: PMC8277187 DOI: 10.1097/pas.0000000000001701] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
SP142 programmed cell death ligand 1 (PD-L1) status predicts response to atezolizumab in triple-negative breast carcinoma (TNBC). Prevalence of VENTANA PD-L1 (SP142) Assay positivity, concordance with the VENTANA PD-L1 (SP263) Assay and Dako PD-L1 IHC 22C3 pharmDx assay, and association with clinicopathologic features were assessed in 447 TNBCs. SP142 PD-L1 intraobserver and interobserver agreement was investigated in a subset of 60 TNBCs, with scores enriched around the 1% cutoff. The effect of a 1-hour training video on pretraining and posttraining scores was ascertained. At a 1% cutoff, 34.2% of tumors were SP142 PD-L1 positive. SP142 PD-L1 positivity was significantly associated with tumor-infiltrating lymphocytes (P <0.01), and node negativity (P=0.02), but not with tumor grade (P=0.35), tumor size (P=0.58), or BRCA mutation (P=0.53). Overall percentage agreement (OPA) for intraobserver and interobserver agreement was 95.0% and 93.7%, respectively, among 5 pathologists trained in TNBC SP142 PD-L1 scoring. In 5 TNBC SP142 PD-L1-naive pathologists, significantly higher OPA to the reference score was achieved after video training (posttraining OPA 85.7%, pretraining OPA 81.5%, P<0.05). PD-L1 status at a 1% cutoff was assessed by SP142 and SP263 in 420 cases, and by SP142 and 22C3 in 423 cases, with OPA of 88.1% and 85.8%, respectively. The VENTANA PD-L1 (SP142) Assay is reproducible for classifying TNBC PD-L1 status by trained observers; however, it is not analytically equivalent to the VENTANA PD-L1 (SP263) Assay and Dako PD-L1 IHC 22C3 pharmDx assay.
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Affiliation(s)
| | | | | | | | | | - Sunil R. Lakhani
- University of Queensland Centre for Clinical Research
- Pathology Queensland, Brisbane
| | | | - Wendy A. Cooper
- Sydney Medical School, The University of Sydney
- Department of Tissue Pathology, Royal Prince Alfred Hospital, NSW Health Pathology
- Western Sydney University, Campbelltown
| | - Jane Armes
- Pathology Queensland, Sunshine Coast, QLD
| | - Ewan K.A. Millar
- NSW Health Pathology, St George Hospital
- St. George and Sutherland Clinical School, University of New South Wales, Kogarah
| | - Wendy Raymond
- Flinders Medical Centre, Flinders University of South Australia
- Clinpath Laboratories, Adelaide, SA, Australia
| | | | | | - Marian Burr
- Royal Melbourne Hospital
- Sir Peter MacCallum Department of Oncology, University of Melbourne
- Department of Medicine, Cambridge Institute of Therapeutic Immunology & Infectious Disease (CITIID), University of Cambridge, Cambridge, UK
| | | | - Kate Harvey
- The Garvan Institute of Medical Research, Darlinghurst
| | - Charles Chan
- Concord Clinical School, The University of Sydney, Sydney
- Concord Repatriation General Hospital, Concord, NSW
| | - Jane Beith
- Sydney Medical School, The University of Sydney
- Chris O’Brien Lifehouse, Camperdown
| | | | - Sandra A. O’Toole
- Sydney Medical School, The University of Sydney
- The Garvan Institute of Medical Research, Darlinghurst
- Department of Tissue Pathology, Royal Prince Alfred Hospital, NSW Health Pathology
- Western Sydney University, Campbelltown
| | - Stephen B. Fox
- Peter MacCallum Cancer Centre
- Sir Peter MacCallum Department of Oncology, University of Melbourne
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11
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Koomen BM, Voorham QJM, Epskamp-Kuijpers CCHJ, van Dooijeweert C, van Lindert ASR, Deckers IAG, Willems SM. Considerable interlaboratory variation in PD-L1 positivity in a nationwide cohort of non-small cell lung cancer patients. Lung Cancer 2021; 159:117-126. [PMID: 34332333 DOI: 10.1016/j.lungcan.2021.07.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/14/2021] [Accepted: 07/16/2021] [Indexed: 11/24/2022]
Abstract
OBJECTIVES Immunohistochemical expression of programmed death-ligand 1 (PD-L1) is used as a predictive biomarker for prescription of immunotherapy to non-small cell lung cancer (NSCLC) patients. Accurate assessment of PD-L1 expression is therefore crucial. In this study, the extent of interlaboratory variation in PD-L1 positivity in the Netherlands was assessed, using real-world clinical pathology data. MATERIALS AND METHODS Data on all NSCLC patients in the Netherlands with a mention of PD-L1 testing in their pathology report from July 2017 to December 2018 were extracted from PALGA, the nationwide network and registry of histo- and cytopathology in the Netherlands. PD-L1 positivity rates were determined for each laboratory that performed PD-L1 testing, with separate analyses for histological and cytological material. Two cutoffs (1% and 50%) were used to determine PD-L1 positivity. Differences between laboratories were assessed using funnel plots with 95% confidence limits around the overall mean. RESULTS 6,354 patients from 30 laboratories were included in the analysis of histology data. At the 1% cutoff, maximum interlaboratory variation was 39.1% (32.7%-71.8%) and ten laboratories (33.3%) differed significantly from the mean. Using the 50% cutoff, four laboratories (13.3%) differed significantly from the mean and maximum variation was 23.1% (17.2%-40.3%). In the analysis of cytology data, 1,868 patients from 23 laboratories were included. Eight laboratories (34.8%) differed significantly from the mean in the analyses of both cutoffs. Maximum variation was 41.2% (32.2%-73.4%) and 29.2% (14.7%-43.9%) using the 1% and 50% cutoffs, respectively. CONCLUSION Considerable interlaboratory variation in PD-L1 positivity was observed. Variation was largest using the 1% cutoff. At the 50% cutoff, analysis of cytology data demonstrated a higher degree of variation than the analysis of histology data.
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Affiliation(s)
- Bregje M Koomen
- Department of Pathology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, the Netherlands.
| | | | - Chantal C H J Epskamp-Kuijpers
- Department of Pathology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, the Netherlands; PALGA Foundation, De Bouw 123, 3991 SZ, Houten, the Netherlands
| | - Carmen van Dooijeweert
- Department of Pathology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, the Netherlands
| | - Anne S R van Lindert
- Department of Pulmonology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, the Netherlands
| | | | - Stefan M Willems
- Department of Pathology, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, the Netherlands; University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Hanzeplein 1, 9713 GZ, Groningen, the Netherlands
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12
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Szturz P, Vermorken JB. Translating KEYNOTE-048 into practice recommendations for head and neck cancer. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:975. [PMID: 32953775 PMCID: PMC7475419 DOI: 10.21037/atm.2020.03.164] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Petr Szturz
- Medical Oncology, Department of Oncology, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Jan B Vermorken
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.,Department of Medical Oncology, Antwerp University Hospital, Edegem, Belgium
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Radonic T, Duin S, Vos W, Kortman P, Zwinderman AH, Thunnissen E. Influence of preanalytical variables on performance of delta-like protein 3 (DLL3) predictive immunohistochemistry. Virchows Arch 2020; 478:293-300. [PMID: 32488689 PMCID: PMC7969697 DOI: 10.1007/s00428-020-02848-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/10/2020] [Accepted: 05/14/2020] [Indexed: 11/24/2022]
Abstract
DLL3 might become a predictive immunohistochemical marker in small cell carcinoma of the lung (SCLC). We investigated the influence of pre-analytical handling of samples on the performance of DLL3 immunohistochemistry (IHC) using DLL3 SP347 ready to use assay (Ventana). DLL3 positive cell lines were subjected to different experimental conditions mimicking the pre-analytical variation in daily clinical practice. Formalin fixation of 24 h led to the most optimal results of DLL3 IHC. Longstanding fixation in Cytolyt, methanol-based fixative for cytology samples, but also decalcification using a mix of formic- and hydrochloracid resulted in decreased DLL3 staining. Postponed staining of blanc slides for 3 months also decreased DLL3 IHC. Postponed fixation of the SCLC cell lines did not influence the performance of DLL3 IHC, although this might be different in the tissues than in the cell lines. In conclusion, different pre-analytical variables decrease the performance of DLL3 IHC. These findings are essential for implementing novel predictive immunohistochemical biomarkers in daily pathology practice.
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Affiliation(s)
- Teodora Radonic
- Department of Pathology, Amsterdam University Medical Center, De Boelelaan, 1117, Amsterdam, The Netherlands.
| | - S Duin
- Department of Pathology, Amsterdam University Medical Center, De Boelelaan, 1117, Amsterdam, The Netherlands
| | - W Vos
- Department of Pathology, Amsterdam University Medical Center, De Boelelaan, 1117, Amsterdam, The Netherlands
| | - P Kortman
- Department of Pathology, Amsterdam University Medical Center, De Boelelaan, 1117, Amsterdam, The Netherlands
| | - Aeilko H Zwinderman
- Department of Clinical Epidemiology and Biostatistics, Amsterdam University Medical Centers, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Erik Thunnissen
- Department of Pathology, Amsterdam University Medical Center, De Boelelaan, 1117, Amsterdam, The Netherlands
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Lantuejoul S, Damiola F, Adam J. Selected highlights of the 2019 Pulmonary Pathology Society Biennial Meeting: PD-L1 test harmonization studies. Transl Lung Cancer Res 2020; 9:906-916. [PMID: 32676356 PMCID: PMC7354161 DOI: 10.21037/tlcr.2020.03.23] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Immune checkpoint inhibitors (ICI) including programmed death 1 (PD-1) inhibitors, such as nivolumab and pembrolizumab, or programmed death ligand 1 (PD-L1) inhibitors, such as atezolizumab and durvalumab, have recently emerged in advanced stage lung cancer as new standards of care. They are now indicated in first- line and second- or later-line treatment of metastatic or locally-advanced stage III non-small cell lung cancer (NSCLC), as well as for metastatic small cell lung cancer (SCLC), as single agent immunotherapy or in combination with chemotherapy. Four PD-L1 immunohistochemistry (IHC) assays have been established and validated in randomized trials, each for a specific ICI. They use different primary monoclonal antibodies, platforms and detection systems, as well as different scoring systems to assess PD-L1 expression either by tumor cells (TCs) and/or by infiltrating immune cells (ICs). Most studies have shown a close analytical performance of three of these clinically-validated standardized assays, but their use restricted to dedicated platforms, which are not all available in most laboratories, questions their applicability. In addition, the relative high costs of the assays have led to the development of in-house protocols in many pathology laboratories. Their use in clinical practice to assess the predictive value of PD-L1 expression for prescription of ICI raises the issue of their reliability and their validation as compared to standardized assays. This article discusses the main comparative studies available between LDT and assays, with clear evidence that LDT can reach a performance equivalent to the trial-validated assays. The requirements are an adequate validation as compared to an appropriate standard, and the participation to external quality assurance programs and training programs for PD-L1 IHC assessment for pathologists.
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Affiliation(s)
- Sylvie Lantuejoul
- Département de Biopathologie et Département de la Recherche Translationnelle et de l'Innovation, Centre Léon Bérard Unicancer, Lyon, France.,Université Grenoble Alpes, Grenoble, France
| | - Francesca Damiola
- Département de Biopathologie et Département de la Recherche Translationnelle et de l'Innovation, Centre Léon Bérard Unicancer, Lyon, France
| | - Julien Adam
- Département de biologie et pathologie médicales, Gustave-Roussy, Villejuif, France
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