1
|
Cassalia F, Danese A, Cocchi E, Vaienti S, Bolzon A, Franceschin L, Mazzetto R, Caroppo F, Melandri D, Belloni Fortina A. Congenital Dermatofibrosarcoma Protuberans-An Update on the Ongoing Diagnostic Challenges. Cancers (Basel) 2025; 17:158. [PMID: 39796784 PMCID: PMC11719814 DOI: 10.3390/cancers17010158] [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: 11/01/2024] [Revised: 12/30/2024] [Accepted: 01/02/2025] [Indexed: 01/13/2025] Open
Abstract
Dermatofibrosarcoma protuberans (DFSP) is a rare, low-grade sarcoma that presents diagnostic challenges due to its resemblance to benign lesions [...].
Collapse
Affiliation(s)
- Fortunato Cassalia
- Unit of Dermatology, Department of Medicine, University of Padova, 35122 Padua, Italy; (A.B.); (L.F.); (R.M.); (F.C.); (A.B.F.)
| | - Andrea Danese
- Unit of Dermatology, Department of Medicine, University of Verona, 37129 Verona, Italy; (A.D.); (S.V.)
| | - Enrico Cocchi
- Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy; (E.C.); (D.M.)
- Department of Precision Medicine and Genomics, Columbia University, New York, NY 10027, USA
- Neonatal and Pediatric Intensive Care Unit, AUSL Romagna, 48121 Ravenna, Italy
| | - Silvia Vaienti
- Unit of Dermatology, Department of Medicine, University of Verona, 37129 Verona, Italy; (A.D.); (S.V.)
| | - Anna Bolzon
- Unit of Dermatology, Department of Medicine, University of Padova, 35122 Padua, Italy; (A.B.); (L.F.); (R.M.); (F.C.); (A.B.F.)
| | - Ludovica Franceschin
- Unit of Dermatology, Department of Medicine, University of Padova, 35122 Padua, Italy; (A.B.); (L.F.); (R.M.); (F.C.); (A.B.F.)
| | - Roberto Mazzetto
- Unit of Dermatology, Department of Medicine, University of Padova, 35122 Padua, Italy; (A.B.); (L.F.); (R.M.); (F.C.); (A.B.F.)
| | - Francesca Caroppo
- Unit of Dermatology, Department of Medicine, University of Padova, 35122 Padua, Italy; (A.B.); (L.F.); (R.M.); (F.C.); (A.B.F.)
- Regional Center for Pediatric Dermatology, Department of Women’s and Children’s Health (SDB), University of Padua, 35122 Padua, Italy
- European Reference Network for Rare Skin Disorders-ERN Skin, Department of Women and Children’s Health (SDB), University of Padua, 35122 Padua, Italy
| | - Davide Melandri
- Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy; (E.C.); (D.M.)
- Dermatology Unit and Burn Center, AUSL Romagna, Cesena Hospital, 47521 Cesena, Italy
| | - Anna Belloni Fortina
- Unit of Dermatology, Department of Medicine, University of Padova, 35122 Padua, Italy; (A.B.); (L.F.); (R.M.); (F.C.); (A.B.F.)
- Regional Center for Pediatric Dermatology, Department of Women’s and Children’s Health (SDB), University of Padua, 35122 Padua, Italy
- European Reference Network for Rare Skin Disorders-ERN Skin, Department of Women and Children’s Health (SDB), University of Padua, 35122 Padua, Italy
| |
Collapse
|
2
|
Drabent P, Kervarrec T, Tallet A, Fraitag S. Neonatal spindle-cell CD34-positive plaque-like tumour: a new entity characterised by NTRK gene fusion. Virchows Arch 2024; 485:729-733. [PMID: 38789627 DOI: 10.1007/s00428-024-03831-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 04/30/2024] [Accepted: 05/19/2024] [Indexed: 05/26/2024]
Affiliation(s)
- P Drabent
- Department of Pathology, Hôpital Universitaire Necker-Enfants Malades, APHP, Paris, France.
| | - T Kervarrec
- Department of Pathology, Centre Hospitalier Universitaire de Tours, Université de Tours, Tours, France
- "Biologie Des Infections À Polyomavirus" Team, UMR INRAE ISP 1282, Université de Tours, Tours, France
| | - A Tallet
- Platform of Somatic Tumor Molecular Genetics, Centre Hospitalier Universitaire de Tours, Tours, France
| | - S Fraitag
- Department of Pathology, Hôpital Universitaire Necker-Enfants Malades, APHP, Paris, France
| |
Collapse
|
3
|
Agrawal S, Ameline B, Folpe AL, Azzato E, Astbury C, Mentzel T, Knapp C, Rütten A, Creytens D, Sukov W, Baumhoer D, Billings SD, Fritchie KJ. ALK-rearranged, CD34-positive spindle cell neoplasms resembling dermatofibrosarcoma protuberans: a study of seven cases. Histopathology 2024; 85:649-659. [PMID: 38867577 DOI: 10.1111/his.15239] [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: 02/28/2024] [Revised: 05/22/2024] [Accepted: 05/25/2024] [Indexed: 06/14/2024]
Abstract
AIMS The majority of dermatofibrosarcoma protuberans (DFSP) harbour PDGFB or PDGFD rearrangements. We encountered ALK expression/rearrangement in a PDGFB/D-negative CD34-positive spindle cell neoplasm with features similar to DFSP, prompting evaluation of ALK-rearrangements in DFSP and plaque-like CD34-positive dermal fibroma (P-LDF). METHODS AND RESULTS We searched the archives of academic institutions for cases previously coded as DFSP and P-LDF. NGS-naïve or PDGFB-negative DFSP were screened for ALK (clone D5F3) expression by immunohistochemistry. NGS or ALK FISH was performed on ALK-positive cases. Methylome profiling studies were performed and compared with conventional DFSP. One case of "DFSP" and two "P-LDF" with ALK expression were identified from the archives, while four cases were detected prospectively. These seven cases (6F:1M; 8 months to 76 years) arose in the dermis of the arm (two), scalp, eyelid, thigh, abdomen, and shoulder and ranged from 0.4 to 4.2 cm. Tumours were composed of spindled cells and displayed a storiform growth pattern. Cytologic atypia was absent, and mitotic figures were scarce (0-2/10 HPFs, high power fields). The lesional cells were diffusely positive for CD34 and ALK and negative for S100 protein. By NGS (n = 5), ALK fusion partners included DCTN1 (2), PLEKHH2, and CLIP2 in DFSP-like cases and FLNA in P-LDF-like lesions. ALK FISH was positive in one (of two) cases previously labelled P-LDF. Methylome profiling of two (of three) ALK-rearranged DFSP-like tumours showed clustering with conventional DFSP in the UMAP dimension reduction plot. To date, no tumour has recurred (n = 2; 26, 27 months). CONCLUSION We describe a cohort of novel ALK-rearranged tumours with morphologic features similar to DFSP.
Collapse
Affiliation(s)
- Shruti Agrawal
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
- Department of Dermatology, Mayo Clinic, Rochester, MN, USA
| | - Baptiste Ameline
- Bone Tumor Reference Center at the Institute for Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Andrew L Folpe
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Elizabeth Azzato
- Department of Anatomic Pathology, Cleveland Clinic, Cleveland, OH, USA
| | - Caroline Astbury
- Department of Anatomic Pathology, Cleveland Clinic, Cleveland, OH, USA
| | - Thomas Mentzel
- MVZ Dermatopathologie Friedrichshafen/Bodensee Part G, Friedrichshafen, Germany
| | - Calvin Knapp
- Department of Anatomic Pathology, Cleveland Clinic, Cleveland, OH, USA
| | - Arno Rütten
- MVZ Dermatopathologie Friedrichshafen/Bodensee Part G, Friedrichshafen, Germany
| | - David Creytens
- Department of Pathology, Ghent University and Ghent University Hospital, Ghent, Belgium
- CRIG, Cancer Research Institute Ghent, Ghent University and Ghent University Hospital, Ghent, Belgium
| | - William Sukov
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Daniel Baumhoer
- Bone Tumor Reference Center at the Institute for Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Steven D Billings
- Department of Anatomic Pathology, Cleveland Clinic, Cleveland, OH, USA
| | - Karen J Fritchie
- Department of Anatomic Pathology, Cleveland Clinic, Cleveland, OH, USA
| |
Collapse
|
4
|
Fan Y, Zhang B, Du X, Wang B, Yan Q, Guo L, Yao W. Regulating Tumorigenicity and Cancer Metastasis through TRKA Signaling. Curr Cancer Drug Targets 2024; 24:271-287. [PMID: 37670705 DOI: 10.2174/1568009623666230904150957] [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: 02/14/2023] [Revised: 07/15/2023] [Accepted: 07/25/2023] [Indexed: 09/07/2023]
Abstract
Tropomyosin receptor kinase (TRK) A, TRKA, is a specific binding receptor of nerve growth factor (NGF), which plays an essential role in the occurrence and progression of human cancers. TRKA overexpression has been proven to be a powerful carcinogenic driver and has been verified in many tumors. The TRKA receptor kinase domain is over-activated in an NGF-dependent manner, accompanied by activation of downstream signal pathways, such as RAS-MAPK, PI3K-AKT, JAK2-STAT3 pathway, PLC γ pathway, and Hippo pathway, which participate in tumor cell proliferation, invasion, epithelial-mesenchymal transition (EMT), perineural invasion (PNI), drug resistance, and cancer pain. In addition, chimeric oncogenes produced by the fusion of NTRK1 and other genes are also the direct cause of tumorigenesis and cancer development. The newly developed TRK inhibitors can improve symptoms and tumor regression in cancer patients with overexpression of TRKA or NTRK1 fusion gene. With the emergence of drug resistance, next generation of TRK inhibitors can still maintain strong clinical efficacy in the case of TRK kinase domain mutations, and these inhibitors are in clinical trials. This review summarizes the characteristics and research progress of TRKA, focusing on the regulatory role of the TRKA signal pathway in different tumors. In addition, we have summarized the clinical significance of TRKA and the TRK inhibitors. This review may provide a new reference for the study of the mechanism of TRKA in different tumors, and also provide a new perspective for the in-depth understanding of the role of TRKA as a biomarker and therapeutic target in human cancer.
Collapse
Affiliation(s)
- Yichao Fan
- Henan Cancer Hospital, Department of Bone and Soft Tissue Cancer, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, China
| | - Boya Zhang
- Henan Cancer Hospital, Department of Bone and Soft Tissue Cancer, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, China
| | - Xinhui Du
- Henan Cancer Hospital, Department of Bone and Soft Tissue Cancer, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, China
| | - Bangmin Wang
- Henan Cancer Hospital, Department of Bone and Soft Tissue Cancer, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, China
| | - Qiang Yan
- Henan Cancer Hospital, Department of Bone and Soft Tissue Cancer, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, China
| | - Liangyu Guo
- Henan Cancer Hospital, Department of Bone and Soft Tissue Cancer, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, China
| | - Weitao Yao
- Henan Cancer Hospital, Department of Bone and Soft Tissue Cancer, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, China
| |
Collapse
|
5
|
Lemelle L, Guillemot D, Hermann AL, Gauthier A, Carton M, Corradini N, Rome A, Berlanga P, Jourdain A, Marie Cardine A, Jannier S, Boutroux H, Defachelles AS, Aerts I, Geoerger B, Karanian M, Doz F, Brisse HJ, Schleiermacher G, Delattre O, Pierron G, Orbach D. Neurotrophic tropomyosin receptor kinase (NTRK) fusion positive tumors: a historical cohort analysis. Expert Rev Anticancer Ther 2023; 23:865-874. [PMID: 37434345 DOI: 10.1080/14737140.2023.2236305] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 07/10/2023] [Indexed: 07/13/2023]
Abstract
BACKGROUND NTRK gene fusions have been identified in various tumors; some requiring aggressive therapy and sometimes new TRK inhibitors (TRKi). We aimed to describe a national, unselected, retrospective, multicenter cohort. RESEARCH DESIGN AND METHODS Patients were identified through the French sarcoma diagnostic laboratory at Institut Curie through samples analyzed by RT-qPCR or whole-transcriptome sequencing. RESULTS From 2001 to 2019, 65 NTRK fusion tumors were identified within 2120 analyses (3.1%): 58 by RNA sequencing (including 20 after RT-qPCR analysis) and 7 exclusively by RT-qPCR. Of the 61 patients identified, 37 patients had infantile soft tissue or kidney fibrosarcomas (IFS), 15 other mesenchymal (Other-MT) and nine central nervous system (CNS) tumors. They encompassed 14 different tumor types with variable behaviors. Overall, 53 patients had surgery (3 mutilating), 38 chemotherapy (20 alkylating agents/anthracycline), 11 radiotherapy, two 'observation strategy' and 13 received TRKi. After a median follow-up of 61.0 months [range, 2.5-226.0], 10 patients died. Five-year overall survival is, respectively, 91.9% [95%CI, 83.5-100.0], 61.1% [95%CI, 34.2-100.0] and 64.8% [95%CI, 39.3-100.0] for IFS, Other-MT, and CNS groups. CONCLUSIONS NTRK-fusion positive tumors are rare but detection is improved through RNA sequencing. TRKi could be considered at diagnosis for CNS NTRK-fusion positive tumors, some IFS, and Other-MT. TRIAL REGISTRATION Not adapted.
Collapse
Affiliation(s)
- Lauriane Lemelle
- SIREDO Oncology Center (Care, Innovation and Research for Children and AYA with Cancer), Institut Curie, Paris, France
| | | | | | | | - Matthieu Carton
- Department of Biostatistics, Institut Curie, PSL University, Paris, France
| | - Nadège Corradini
- Institut d'Hematologie Et d'Oncologie Pédiatrique, Centre Léon Bérard, Lyon, France
| | - Angélique Rome
- Department of Pediatric Oncology, Assistance Publique des Hopitaux de Marseille, Marseille, France
| | - Pablo Berlanga
- Department of Pediatric and Adolescent Oncology, Gustave Roussy, Villejuif, France
| | - Anne Jourdain
- Department of Pediatric Oncology and Haematology, University Hospital of Tours, Tours, France
| | - Aude Marie Cardine
- Pediatric Immuno-Hematology-Oncology Unit, University Hospital of Rouen, Rouen, France
| | - Sarah Jannier
- Pediatric Oncology Department, University Hospital of Strasbourg, Strasbourg, France
| | - Hélène Boutroux
- Department of Pediatric Onco-Hematology, Armand Trousseau Hospital, Paris, France
| | | | - Isabelle Aerts
- SIREDO Oncology Center (Care, Innovation and Research for Children and AYA with Cancer), Institut Curie, Paris, France
| | - Birgit Geoerger
- Department of Pediatric and Adolescent Oncology, Gustave Roussy, Villejuif, France
| | - Marie Karanian
- Department of Pathology, Centre Leon Bérard, Lyon, France
| | - François Doz
- SIREDO Oncology Center (Care, Innovation and Research for Children and AYA with Cancer), Institut Curie, Paris, France
- Université Paris-Cité, Paris, France
| | | | - Gudrun Schleiermacher
- SIREDO Oncology Center (Care, Innovation and Research for Children and AYA with Cancer), Institut Curie, Paris, France
| | - Olivier Delattre
- SIREDO Oncology Center (Care, Innovation and Research for Children and AYA with Cancer), Institut Curie, Paris, France
- Department of Somatic Genetics, Institut Curie, Paris, France
| | - Gaëlle Pierron
- Department of Somatic Genetics, Institut Curie, Paris, France
| | - Daniel Orbach
- SIREDO Oncology Center (Care, Innovation and Research for Children and AYA with Cancer), Institut Curie, Paris, France
| |
Collapse
|
6
|
Sabater-Marco V, Cerveró LN, Ninet VZ, López NS. An Unusual Vulvar Mass in an Adolescent: Answer. Am J Dermatopathol 2023; 45:429-430. [PMID: 37191375 DOI: 10.1097/dad.0000000000002434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
|
7
|
Cervi C, Sápi Z, Bedics G, Zajta E, Hegyi L, Pápay J, Dezső K, Varga E, Mudra K, Bödör C, Csóka M. Case report: Complete and durable response to larotrectinib (TRK inhibitor) in an infant diagnosed with angiosarcoma harbouring a KHDRBS1-NTRK3 fusion gene. Front Oncol 2023; 13:999810. [PMID: 36910630 PMCID: PMC9997097 DOI: 10.3389/fonc.2023.999810] [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: 07/21/2022] [Accepted: 02/07/2023] [Indexed: 02/25/2023] Open
Abstract
Significant improvements in the survival rates of paediatric cancer have been achieved over the past decade owing to recent advances in therapeutic and diagnostic strategies. However, disease progression and relapse remain a major challenge for the clinical management of paediatric angiosarcoma. Comprehensive genomic profiling of these rare tumours using high-throughput sequencing technologies may improve patient stratification and identify actionable biomarkers for therapeutic intervention. Here, we describe the clinical, histopathological, immunohistochemical and molecular profile of a novel and precision medicine-informed case where a KHDRBS1-NTRK3 fusion determined by next-generation sequencing-based comprehensive genomic profiling led to complete and sustained remission (clinical and radiological response) in an otherwise incurable disease. Our patient represents the first paediatric angiosarcoma harbouring a targetable NTRK3 fusion in the literature and demonstrates the first example of targeting this alteration in angiosarcoma using larotrectinib, an NTRK inhibitor. Clinical and radiological remission was achieved in under two months of therapy, and the patient is currently in complete remission, 4 month after stopping larotrectinib therapy, which was given over 17 months with only mild side effects reported. Therefore, this remarkable case exemplifies the true essence of precision-based care by incorporating conventional pathology with the why, when, and how to test for rare oncogenic drivers and agnostic biomarkers in paediatric angiosarcoma.
Collapse
Affiliation(s)
- Catherine Cervi
- Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
- 2 Department of Paediatrics, Semmelweis University, Budapest, Hungary
| | - Zoltán Sápi
- Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Gábor Bedics
- Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
- HCEMM-SE Molecular Oncohematology Research Group, Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Erik Zajta
- Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
- HCEMM-SE Molecular Oncohematology Research Group, Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Lajos Hegyi
- Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
- HCEMM-SE Molecular Oncohematology Research Group, Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Judit Pápay
- Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Katalin Dezső
- Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Edit Varga
- 2 Department of Paediatrics, Semmelweis University, Budapest, Hungary
| | - Katalin Mudra
- 2 Department of Paediatrics, Semmelweis University, Budapest, Hungary
| | - Csaba Bödör
- Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
- HCEMM-SE Molecular Oncohematology Research Group, Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Monika Csóka
- 2 Department of Paediatrics, Semmelweis University, Budapest, Hungary
| |
Collapse
|
8
|
Lanic MD, Le Loarer F, Rainville V, Sater V, Viennot M, Beaussire L, Viailly PJ, Angot E, Hostein I, Jardin F, Ruminy P, Laé M. Detection of sarcoma fusions by a next-generation sequencing based-ligation-dependent multiplex RT-PCR assay. Mod Pathol 2022; 35:649-663. [PMID: 35075283 DOI: 10.1038/s41379-021-00980-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 11/18/2021] [Accepted: 11/19/2021] [Indexed: 11/09/2022]
Abstract
Morphological, immunohistochemical, and molecular methods often need to be combined for accurate diagnosis and optimal clinical management of sarcomas. Here, we have developed, a new molecular diagnostic assay, for the detection of gene fusions in sarcomas. This targeted multiplexed next-generation sequencing (NGS)-based method utilizes ligation dependent reverse-transcriptase polymerase chain reaction (LD-RT-PCR-NGS) to detect oncogenic fusion transcripts involving 137 genes, leading to 139 gene fusions known to be recurrently rearranged in soft-tissue and bone tumors. 158 bone and soft-tissue tumors with previously identified fusion genes by fluorescent in situ hybridization (FISH) or RT-PCR were selected to test the specificity and the sensitivity of this assay. RNA were extracted from formalin-fixed paraffin-embedded (n = 143) or frozen (n = 15) material (specimen; n = 42 or core needle biopsies; n = 116). Tested tumors encompassed 23 major translocation-related sarcomas types, including Ewing and Ewing-like sarcomas, rhabdomyosarcomas, desmoplastic small round-cell tumors, clear-cell sarcomas, infantile fibrosarcomas, endometrial stromal sarcomas, epithelioid hemangioendotheliomas, alveolar soft-part sarcomas, biphenotypic sinonasal sarcomas, extraskeletal myxoid chondrosarcomas, myxoid/round-cell liposarcomas, dermatofibrosarcomas protuberans and solitary fibrous tumors. In-frame fusion transcripts were detected in 98.1% of cases (155/158). Gene fusion assay results correlated with conventional techniques (FISH and RT-PCR) in 155/158 tumors (98.1%). These data demonstrate that this assay is a rapid, robust, highly sensitive, and multiplexed targeted RNA sequencing assay for the detection of recurrent gene fusions on RNA extracted from routine clinical specimens of sarcomas (formalin-fixed paraffin-embedded or frozen). It facilitates the precise diagnosis and identification of tumors with potential targetable fusions. In addition, this assay can be easily customized to cover new fusions.
Collapse
Affiliation(s)
- Marie-Delphine Lanic
- INSERM U1245, Cancer Center Henri Becquerel, Institute of Research and Innovation in Biomedicine (IRIB), University of Normandy, UNIROUEN, Rouen, France
| | - François Le Loarer
- Department of Pathology, Institut Bergonié, cours de l'Argonne, 33000, Bordeaux, France
| | - Vinciane Rainville
- INSERM U1245, Cancer Center Henri Becquerel, Institute of Research and Innovation in Biomedicine (IRIB), University of Normandy, UNIROUEN, Rouen, France
| | - Vincent Sater
- INSERM U1245, Cancer Center Henri Becquerel, Institute of Research and Innovation in Biomedicine (IRIB), University of Normandy, UNIROUEN, Rouen, France
| | - Mathieu Viennot
- INSERM U1245, Cancer Center Henri Becquerel, Institute of Research and Innovation in Biomedicine (IRIB), University of Normandy, UNIROUEN, Rouen, France
| | - Ludivine Beaussire
- INSERM U1245, Cancer Center Henri Becquerel, Institute of Research and Innovation in Biomedicine (IRIB), University of Normandy, UNIROUEN, Rouen, France.,Department of Pathology, Centre Henri Becquerel, rue d'Amiens, 76038, Rouen, France
| | - Pierre-Julien Viailly
- INSERM U1245, Cancer Center Henri Becquerel, Institute of Research and Innovation in Biomedicine (IRIB), University of Normandy, UNIROUEN, Rouen, France
| | - Emilie Angot
- Department of Pathology, Rouen University Hospital, 76031, Rouen, France
| | - Isabelle Hostein
- Department of Pathology, Institut Bergonié, cours de l'Argonne, 33000, Bordeaux, France
| | - Fabrice Jardin
- INSERM U1245, Cancer Center Henri Becquerel, Institute of Research and Innovation in Biomedicine (IRIB), University of Normandy, UNIROUEN, Rouen, France
| | - Philippe Ruminy
- INSERM U1245, Cancer Center Henri Becquerel, Institute of Research and Innovation in Biomedicine (IRIB), University of Normandy, UNIROUEN, Rouen, France.
| | - Marick Laé
- INSERM U1245, Cancer Center Henri Becquerel, Institute of Research and Innovation in Biomedicine (IRIB), University of Normandy, UNIROUEN, Rouen, France. .,Department of Pathology, Centre Henri Becquerel, rue d'Amiens, 76038, Rouen, France.
| |
Collapse
|
9
|
Drabent P, Fraitag S. Malignant Superficial Mesenchymal Tumors in Children. Cancers (Basel) 2022; 14:cancers14092160. [PMID: 35565289 PMCID: PMC9104419 DOI: 10.3390/cancers14092160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 04/12/2022] [Accepted: 04/22/2022] [Indexed: 11/16/2022] Open
Abstract
Malignant superficial mesenchymal tumors are a very diverse group of neoplasms with few clinical and radiological discriminatory factors. Hence, some of these cancers are rarely suspected based on clinical and radiological grounds, others may be easily misdiagnosed, and the histological analysis of a biopsy or resection is central in the diagnostic process. In children, the age at presentation is a major element of the differential diagnosis. Some tumors have a very distinct epidemiology, while others may be seen at any age. More recently, the advances in molecular biology have greatly improved the diagnosis of mesenchymal tumors and new entities are still being described. In the present review, we provide an overview of the diversity of malignant superficial mesenchymal tumors in children, including new and/or rare entities. We discuss the important diagnostic features, be they clinical, histological, or molecular. Special attention was given to the genetic features of these tumors, particularly when they were helpful for the diagnosis or treatment.
Collapse
Affiliation(s)
- Philippe Drabent
- Department of Pathology, Necker-Enfants Malades Hospital, APHP, 75015 Paris, France;
- Faculté de Médecine, Université de Paris, 75005 Paris, France
| | - Sylvie Fraitag
- Department of Pathology, Necker-Enfants Malades Hospital, APHP, 75015 Paris, France;
- Faculté de Médecine, Université de Paris, 75005 Paris, France
- Correspondence:
| |
Collapse
|
10
|
Llamas Velasco M, Itlinger-Monshi B, Flucke U, Mentzel T. Dermal lipofibromatosis-like neural tumor. J Cutan Pathol 2022; 49:525-531. [PMID: 35195930 DOI: 10.1111/cup.14216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 01/26/2022] [Accepted: 02/03/2022] [Indexed: 11/26/2022]
Affiliation(s)
- M Llamas Velasco
- Department of Dermatology. Hospital Universitario de la Princesa, Madrid, Spain. Fundación de Investigación Sanitaria (IIS-IP)
| | - B Itlinger-Monshi
- Pathology Department. Klinik Landstraße, Vienna Healthcare Group, Austria
| | - U Flucke
- Department of Pathology, Radboud University, Medical Center, Nijmegen, The Netherlands
| | - T Mentzel
- MVZ Dermatopathologie Friedrichshafen/Bodensee, Germany
| |
Collapse
|
11
|
Lara-Valencia P, Ybo A, Coter A. Fibroblastic Connective Tissue Nevus Mimicking Lipoma on Ultrasound: Case Report and Brief Review. Dermatopathology (Basel) 2022; 9:32-34. [PMID: 35076520 PMCID: PMC8788548 DOI: 10.3390/dermatopathology9010005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/11/2022] [Accepted: 01/16/2022] [Indexed: 02/01/2023] Open
Abstract
Fibroblastic connective tissue nevus (FCTN) is a rare, benign, and recently described dermal mesenchymal lesion characterized by CD34-positive spindle cells. We present a case of FCTN on the upper back of a 9-month-old boy who was diagnosed with a benign lipoma by ultrasound.
Collapse
|
12
|
Drabent P, Fraitag S. Update on Superficial Spindle Cell Mesenchymal Tumors in Children. Dermatopathology (Basel) 2021; 8:285-300. [PMID: 34449590 PMCID: PMC8395933 DOI: 10.3390/dermatopathology8030035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/05/2021] [Accepted: 07/08/2021] [Indexed: 12/23/2022] Open
Abstract
The diagnosis of cutaneous and subcutaneous spindle cell neoplasms in children is often challenging and has potential therapeutic and prognostic implications. Although correctly diagnosing dermatofibrosarcoma protuberans and infantile fibrosarcoma is paramount, pathologists should not ignore a number of diagnostic pitfalls linked to mostly rare tumors with completely different clinical outcomes. In the last decade, a spectrum of novel entities has been described; information from molecular biology has helped to shape this new landscape for spindle cell tumors. Here, we review the most noteworthy neoplasms in this spectrum, with a focus on their histological similarities: fibroblastic connective tissue nevus, medallion-like dermal dendrocyte hamartoma, or plaque-like CD34-positive dermal fibroma, which share features with fibrous hamartoma of infancy; lipofibromatosis and lipofibromatosis-like neural tumor; and plexiform myofibroblastoma, a recently described neoplasm that should be distinguished from plexiform fibrohistiocytic tumor. These tumors also have genetic similarities, particularly gene rearrangements involving NTRK3 or NTRK1. These genetic features are not only essential for the differential diagnosis of infantile fibrosarcoma but are also of diagnostic value for lipofibromatosis-like neural tumors. The more recently described RET, RAF1, and BRAF gene fusions are also discussed.
Collapse
Affiliation(s)
- Philippe Drabent
- Department of Pathology, Necker-Enfants Malades Hospital, 75015 Paris, France;
- Faculty of Medicine, Sorbonne University, 75006 Paris, France
| | - Sylvie Fraitag
- Department of Pathology, Necker-Enfants Malades Hospital, 75015 Paris, France;
- Faculty of Medicine, University of Paris, 75006 Paris, France
| |
Collapse
|
13
|
Cyrta J, Gauthier A, Karanian M, Vieira AF, Cardoen L, Jehanno N, Bouvet M, Bouvier C, Komuta M, Le Loarer F, Orbach D, Rome A, Minard-Colin V, Brichard B, Pluchart C, Thebaud E, Renard M, Pannier S, Brisse H, Petit P, Benoist C, Schleiermacher G, Geoerger B, Vincent-Salomon A, Fréneaux P, Pierron G. Infantile Rhabdomyosarcomas With VGLL2 Rearrangement Are Not Always an Indolent Disease: A Study of 4 Aggressive Cases With Clinical, Pathologic, Molecular, and Radiologic Findings. Am J Surg Pathol 2021; 45:854-867. [PMID: 33949344 DOI: 10.1097/pas.0000000000001702] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
VGLL2-rearranged rhabdomyosarcomas (RMS) are rare low-grade tumors with only favorable outcomes reported to date. We describe 4 patients with VGLL2-rearranged RMS confirmed by molecular studies, who experienced local progression and distant metastases, including 2 with fatal outcomes. Tumors were diagnosed at birth (n=3) or at 12 months of age (n=1), and were all localized at initial diagnosis, but unresectable and therefore managed with chemotherapy and surveillance. Metastatic progression occurred from 1 to 8 years from diagnosis (median, 3.5 y). Three patients experienced multimetastatic spread and one showed an isolated adrenal metastasis. At initial diagnosis, 3 tumors displaying bland morphology were misdiagnosed as fibromatosis or infantile fibrosarcoma and initially managed as such, while 1 was a high-grade sarcoma. At relapse, 3 tumors showed high-grade morphology, while 1 retained a low-grade phenotype. Low-grade primary tumors showed only very focal positivity for desmin, myogenin, and/or MyoD1, while high-grade tumors were heterogenously or diffusely positive. Whole-exome sequencing, performed on primary and relapse samples for 3 patients, showed increased genomic instability and additional genomic alterations (eg, TP53, CDKN2A/B, FGFR4) at relapse, but no recurrent events. RNA sequencing confirmed that high-grade tumors retained VGLL2 fusion transcripts and transcriptomic profiles consistent with VGLL2-rearranged RMS. High-grade samples showed a high expression of genes encoding cell cycle proteins, desmin, and some developmental factors. These 4 cases with distinct medical history imply the importance of complete surgical resection, and suggest that RMS-type chemotherapy should be considered in unresectable cases, given the risk of high-grade transformation. They also emphasize the importance of correct initial diagnosis.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | - Mina Komuta
- Departments of Pathology
- Department of Pathology, School of Medicine, Keio University, Tokyo, Japan
| | | | - Daniel Orbach
- SIREDO Oncology Center (Care, Innovation and Research for Children and AYA With Cancer), Curie Institute, PSL Research University
| | | | - Véronique Minard-Colin
- Department of Pediatric and Adolescent Oncology, Gustave Roussy Cancer Campus, INSERM U1015, Paris-Saclay University, Villejuif
| | - Bénédicte Brichard
- Pediatric Hematology/Oncology, University Hospital Saint-Luc, Catholic University of Leuven, Brussels, Belgium
| | - Claire Pluchart
- Department of Paediatric Oncology/Hematology, American Hospital, University Hospital of Reims, Reims, France
| | - Estelle Thebaud
- Department of Pediatric Hemato-oncology, University Hospital of Nantes, Nantes
| | - Marleen Renard
- Pediatric Hematology/Oncology, University Hospital Saint-Luc, Catholic University of Leuven, Brussels, Belgium
| | - Stéphanie Pannier
- Department of Orthopedic Surgery, University Hospital Necker-Enfants-Malades, Paris
| | | | - Philippe Petit
- Radiology, La Timone Hospital, Aix Marseille University, Marseille
| | | | - Gudrun Schleiermacher
- SIREDO Oncology Center (Care, Innovation and Research for Children and AYA With Cancer), Curie Institute, PSL Research University
| | - Birgit Geoerger
- Department of Pediatric and Adolescent Oncology, Gustave Roussy Cancer Campus, INSERM U1015, Paris-Saclay University, Villejuif
| | | | | | | |
Collapse
|
14
|
Chunn LM, Nefcy DC, Scouten RW, Tarpey RP, Chauhan G, Lim MS, Elenitoba-Johnson KSJ, Schwartz SA, Kiel MJ. Mastermind: A Comprehensive Genomic Association Search Engine for Empirical Evidence Curation and Genetic Variant Interpretation. Front Genet 2020; 11:577152. [PMID: 33281875 PMCID: PMC7691534 DOI: 10.3389/fgene.2020.577152] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 10/19/2020] [Indexed: 12/21/2022] Open
Abstract
Design and interpretation of genome sequencing assays in clinical diagnostics and research labs is complicated by an inability to identify information from the medical literature and related databases quickly, comprehensively and reproducibly. This challenge is compounded by the complexity and heterogeneity of nomenclatures used to describe diseases, genes and genetic variants. Mastermind is a widely-used bioinformatic platform of genomic associations that has indexed more than 7.5 M full-text articles and 2.5 M supplemental datasets. It has automatically identified, disambiguated and annotated >6.1 M genetic variants and identified >50 K disease-gene associations. Here, we describe how Mastermind improves the sensitivity and reproducibility of clinical variant interpretation and produces comprehensive genomic landscapes of genetic variants driving pharmaceutical research. We demonstrate an alarmingly high degree of heterogeneity across commercially available panels for hereditary cancer that is resolved by evidence from Mastermind. We further examined the sensitivity of Mastermind for variant interpretation by examining 108 clinically-encountered variants and comparing the results to alternate methods. Mastermind demonstrated a sensitivity of 98.4% compared to 4.4, 45.6, and 37.4% for alternatives PubMed, Google Scholar, and ClinVar, respectively, and a specificity of 98.5% compared to 45.1, 57.6, and 68.8% as well as an increase in content yield of 22.6-, 2.2-, and 2.6-fold. When curated for clinical significance, Mastermind identified more than 4.9-fold more pathogenic variants than ClinVar for representative genes. For structural variants, we compared Mastermind's ability to sensitively identify evidence for 10 representative disease-causing CNVs versus results identified in PubMed, as well as its ability to identify evidence for fusion events compared to COSMIC. Mastermind demonstrated a 4.0- to 43.9-fold increase in references for specific CNVs compared to PubMed, as well as 5.4-fold more fusion genes when compared with COSMIC's curated database. Additionally, Mastermind produced an 8.0-fold increase in reference citations for fusion events common to Mastermind and outside databases. Taken together, these results demonstrate the utility and superiority of Mastermind in terms of both sensitivity and specificity of automated results for clinical diagnostic variant interpretation for multiple genetic variant types and highlight the potential benefit in informing pharmaceutical research.
Collapse
Affiliation(s)
| | | | | | - Ryan P. Tarpey
- The Johns Hopkins Hospital, Department of Pharmacy, Baltimore, MD, United States
| | | | - Megan S. Lim
- Division of Hematopathology, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Kojo S. J. Elenitoba-Johnson
- Division of Precision and Computational Diagnostics, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | | | | |
Collapse
|
15
|
Davis JL, Vargas SO, Rudzinski ER, López Marti JM, Janeway K, Forrest S, Winsnes K, Pinto N, Yang SE, VanSandt M, Boyd TK, Corless CL, Liu YJ, Surrey LF, Harris MH, Church A, Al-Ibraheemi A. Recurrent RET gene fusions in paediatric spindle mesenchymal neoplasms. Histopathology 2020; 76:1032-1041. [PMID: 31994201 DOI: 10.1111/his.14082] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/22/2020] [Accepted: 01/25/2020] [Indexed: 01/02/2023]
Abstract
AIMS The classification of paediatric spindle mesenchymal tumours is evolving, and the spectrum of so-called 'infantile fibrosarcoma' has expanded to include tumours with NTRK, BRAF and MET gene fusions. RET-rearranged paediatric spindle cell neoplasms are an emerging group; there is sparse literature on their clinical, pathological and genetic features, and their nosological place in the canon of soft tissue tumours is uncertain. In this study, we report five RET-rearranged paediatric spindle cell tumours with fusion partners MYH10, KIAA1217 and CLIP2. METHODS AND RESULTS The tumours occurred in the pelvic region, paraspinal region, kidney and subcutaneous tissue of hand and abdomen. The patients' ages ranged from 6 months to 13 years (median 1 year). The tumours were composed of monomorphic spindle cells arranged in a fascicular pattern. Lesional cells had minimally atypical ovoid or tapered nuclei and pale cytoplasm with indistinct borders. Necrosis was not identified. Mitoses numbered three to 12 per 10 high-power field. Cases showed inconsistent and variable expression of S100, CD34 and SMA. Clinical behaviour ranged from small lesions potentially cured by simple resection to large lesions exhibiting metastasis, but responsive to kinase inhibitor therapy. CONCLUSIONS Our findings help to define RET-rearranged spindle cell tumours. Although it is likely that these tumours comprise part of the morphological and clinical spectrum of infantile fibrosarcoma (IFS), identification of RET gene alteration is important for its unique therapeutic implications.
Collapse
Affiliation(s)
- Jessica L Davis
- Department of Pathology, Oregon Health and Science University, Portland, OR, USA
| | - Sara O Vargas
- Department of Pathology, Boston Children's Hospital, Boston, MA, USA
| | - Erin R Rudzinski
- Department of Laboratories, Seattle Children's Hospital, Seattle, WA, USA
| | - Jessica M López Marti
- Department of Pathology, Hospital Nacional de Pediatria Juan P. Garrahan, Buenos Aires, Argentina
| | - Katherine Janeway
- Department of Oncology, Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Boston, MA, USA
| | - Suzanne Forrest
- Department of Oncology, Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Boston, MA, USA
| | - Katrina Winsnes
- Division of Pediatric Hematology and Oncology, Oregon Health and Science University/Doernbecher Children's Hospital, Portland, OR, USA
| | - Navin Pinto
- Cancer and Blood Disorders Center, Seattle Children's Hospital, University of Washington Medical Center and Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Sung E Yang
- Department of Pathology, Oregon Health and Science University, Portland, OR, USA
| | - Mandy VanSandt
- Department of Pathology, Oregon Health and Science University, Portland, OR, USA
| | - Theonia K Boyd
- Department of Pathology, Boston Children's Hospital, Boston, MA, USA
| | | | - Yajuan J Liu
- Department of Pathology, University of Washington School of Medicine, Seattle, WA, USA
| | - Lea F Surrey
- Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Marian H Harris
- Department of Pathology, Boston Children's Hospital, Boston, MA, USA
| | - Alanna Church
- Department of Pathology, Boston Children's Hospital, Boston, MA, USA
| | | |
Collapse
|
16
|
Roles of TrkC Signaling in the Regulation of Tumorigenicity and Metastasis of Cancer. Cancers (Basel) 2020; 12:cancers12010147. [PMID: 31936239 PMCID: PMC7016819 DOI: 10.3390/cancers12010147] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 01/02/2020] [Accepted: 01/07/2020] [Indexed: 12/12/2022] Open
Abstract
Tropomyosin receptor kinase (Trk) C contributes to the clinicopathology of a variety of human cancers, and new chimeric oncoproteins containing the tyrosine kinase domain of TrkC occur after fusion to the partner genes. Overexpression of TrkC and TrkC fusion proteins was observed in patients with a variety of cancers, including mesenchymal, hematopoietic, and those of epithelial cell lineage. Both microRNAs (miRNAs) and long non-coding RNAs (lncRNAs) were involved in the regulation of TrkC expression through transcriptional and posttranscriptional alteration. Aberrant activation of TrkC and TrkC fusion proteins markedly induces the epithelial-mesenchymal transition (EMT) program, growth rate, tumorigenic capacity via constitutive activation of Ras-MAP kinase (MAPK), PI3K-AKT, and the JAK2-STAT3 pathway. The clinical trial of TrkC or TrkC fusion-positive cancers with newly developed Trk inhibitors demonstrated that Trk inhibitors were highly effective in inducing tumor regression in patients who do not harbor mutations in the kinase domain. Recently, there has been a progressive accumulation of mutations in TrkC or the TrkC fusion protein detected in the clinic and its related cancer cell lines caused by high-throughput DNA sequencing. Despite given the high overall response rate against Trk or Trk fusion proteins-positive solid tumors, acquired drug resistance was observed in patients with various cancers caused by mutations in the Trk kinase domain. To overcome acquired resistance caused by kinase domain mutation, next-generation Trk inhibitors have been developed, and these inhibitors are currently under investigation in clinical trials.
Collapse
|
17
|
Lacambra MD, Weinreb I, Demicco EG, Chow C, Sung YS, Swanson D, To KF, Wong KC, Antonescu CR, Dickson BC. PRRX-NCOA1/2 rearrangement characterizes a distinctive fibroblastic neoplasm. Genes Chromosomes Cancer 2019; 58:705-712. [PMID: 31008539 DOI: 10.1002/gcc.22762] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 04/17/2019] [Accepted: 04/18/2019] [Indexed: 12/19/2022] Open
Abstract
Fibroblastic/myofibroblastic neoplasms represent a broad, and occasionally diagnostically challenging, category of soft tissue neoplasms. A subset of these tumors defy conventional classification. However, with the advent of next-generation sequencing, the identification of disease-defining molecular alterations is gradually improving their subclassification. Following identification of two index cases of a distinctive fibroblastic neoplasm with a fusion gene involving PRRX1 and NCOA1, we performed a retrospective review to further characterize this entity. We identified two additional cases, including one with a fusion between PRRX1 and NCOA2. The average patient age was 38 years, and three patients were female. Two tumors occurred on the neck, and the others involved the groin and thigh. Tumors were centered in the subcutis and ranged from 2.3 to 14.0 cm (average 5.8 cm). Morphologically, they were predominantly hypocellular, with focal hypercellularity. They were composed of monomorphic spindle-stellate cells with a vague fascicular pattern. The nuclei were bland with only rare mitotic activity, and occasional multinucleation. The intervening stroma was typically abundant and ranged from myxoid to collagenous, with frequent rope-like collagen bundles. Three of the cases had a prominent vasculature ranging from numerous small curvilinear vessels to ectatic and branching staghorn-like vessels. Immunohistochemistry was negative for desmin, smooth muscle actin, S100, CD34, keratin, and epithelial membrane antigen. Each of the patients was treated by simple excision and none of the tumors were associated with local recurrence or metastasis. Based on their unique morphological and molecular attributes, we believe this represents a novel fibroblastic tumor for which we have tentatively proposed the name "PRRX-NCOAx-rearranged fibroblastic tumor."
Collapse
Affiliation(s)
- Maribel D Lacambra
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Ilan Weinreb
- Department of Pathology, University Health Network, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Elizabeth G Demicco
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Department of Pathology and Laboratory Medicine, Mount Sinai Health System, Toronto, Ontario, Canada
| | - Chit Chow
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Yun-Shao Sung
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - David Swanson
- Department of Pathology, University Health Network, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Ka-Fai To
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Kwok-Chuen Wong
- Musculokeletal Oncology, Prince of Wales Hospital, Hong Kong, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Cristina R Antonescu
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Brendan C Dickson
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Department of Pathology and Laboratory Medicine, Mount Sinai Health System, Toronto, Ontario, Canada
| |
Collapse
|