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Kishikawa S, Kondo A, Yao T, Saito T. Case report: A mesenchymal chondrosarcoma with alternative HEY1::NCOA2 fusions in the sella turcica. Pathol Oncol Res 2024; 30:1611730. [PMID: 39165647 PMCID: PMC11333213 DOI: 10.3389/pore.2024.1611730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 07/25/2024] [Indexed: 08/22/2024]
Abstract
Introduction Mesenchymal chondrosarcoma (MCS) is a rare subtype of chondrosarcoma that occurs at widespread anatomical locations, such as bone, soft tissue, and intracranial sites. The central nervous system (CNS) is one of the most common origins of extraosseous MCS. However, alternative HEY1::NCOA2 fusions have not been reported in this tumor. Case report We report a case of intracranial MCS with HEY1::NCOA2 rearrangement. A 52-year-old woman presented with a 15-mm calcified mass around the sella turcica. She initially underwent transsphenoidal surgery for tumor resection and then additional resections for five local recurrences over 5 years. Histologically, the tumor was composed of small round to spindle-shaped cells admixed with well-differentiated hyaline cartilaginous islands. A hemangiopericytoma-like vascular pattern and small sinusoid-like vessels were also observed. RNA sequencing using RNA extracted from formalin-fixed paraffin-embedded samples from the last operation revealed two alternative variants of the HEY1::NCOA2 fusion: HEY1(ex4)::NCOA2 (ex13) and HEY1(ex4)::NCOA2(ex14). Both variants were confirmed as in-frame fusions using reverse transcription-polymerase chain reaction. Discussion Cartilaginous components were often not apparent during the recurrences. In addition to the non-typical pathological finding, the correct diagnosis was hampered by the poor RNA quality of the surgical specimens and non-specific STAT6 nuclear staining. Conclusion This is the first reported case of intracranial MCS with an alternative HEY1::NCOA2 fusion.
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Affiliation(s)
- Satsuki Kishikawa
- Department of Human Pathology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Akihide Kondo
- Department of Neurosurgery, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Takashi Yao
- Department of Human Pathology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
| | - Tsuyoshi Saito
- Department of Human Pathology, Graduate School of Medicine, Juntendo University, Tokyo, Japan
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Park H, Banegas DW, Han SY, Kim HS, Cha IH, Ryu HJ, Kim D. Primary palatal sarcoma exhibiting EWSR1::RORß fusion: a first case report and literature review. Oral Surg Oral Med Oral Pathol Oral Radiol 2024:S2212-4403(24)00372-9. [PMID: 39069454 DOI: 10.1016/j.oooo.2024.06.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Revised: 06/23/2024] [Accepted: 06/28/2024] [Indexed: 07/30/2024]
Abstract
In this report, a tumor exhibited EWSR1::RORß gene fusion, to our knowledge, is the first such reported case. The Ewing sarcoma breakpoint region 1 gene (EWSR1) is known to be associated with several soft tissue tumors although its specific role remains unclear. Its fusion with a member of the ETS family, including FLI1 and ERG, results in Ewing sarcoma, and its fusion with other genes unrelated to the ETS family, including NFATC2 and PATZ1, results in round cell sarcoma with EWSR1-non-ETS fusions, previously referred to as Ewing-like sarcoma. RORß encodes retinoic acid-related orphan receptor ß, a nuclear receptor (NR), and is involved in circadian rhythm modulation and cancer regulation. The specific role of RORß in tumorigenesis remains unclear; however, this case report suggests that it may form part of a new tumorigenic entity.
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Affiliation(s)
- Haein Park
- Department of Oral and Maxillofacial Surgery, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Daniel Wilfredo Banegas
- Department of Oral and Maxillofacial Surgery, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Seung-Yong Han
- Department of Oral Pathology, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Hyun Sil Kim
- Department of Oral Pathology, Yonsei University College of Dentistry, Seoul, Republic of Korea; Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - In-Ho Cha
- Department of Oral and Maxillofacial Surgery, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Hyang Joo Ryu
- Department of Pathology, Yonsei University College of Medicine, Severance Hospital, Seoul, Republic of Korea
| | - Dongwook Kim
- Department of Oral and Maxillofacial Surgery, Yonsei University College of Dentistry, Seoul, Republic of Korea.
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3
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Hu QL, Zeng C. Clinicopathological analysis of EWSR1/FUS::NFATC2 rearranged sarcoma in the left forearm: A case report. World J Clin Cases 2024; 12:2887-2893. [PMID: 38899283 PMCID: PMC11185342 DOI: 10.12998/wjcc.v12.i16.2887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 03/13/2024] [Accepted: 04/11/2024] [Indexed: 05/29/2024] Open
Abstract
BACKGROUND We present a case of an EWSR1/FUS::NFATC2 rearranged sarcoma in the left forearm and analyze its clinicopathological and molecular features. CASE SUMMARY The patient is a 23-year-old woman. Microscopically, the tumor cells were medium-sized round cells arranged in small nests. The cytoplasm was clear, nuclei were relatively uniform, chromatin was dense, nucleoli were visible, and mitotic figures were rare. Immunohistochemically, the tumor cells were positive for Vimentin, INI-1, CD99, NKX2.2, CyclinD1, friend leukaemia virus integration 1, and NKX3.1. Next-generation sequencing revealed the presence of the EWSR1-NFATC2 fusion gene. EWSR1/FUS::NFATC2 rearranged sarcomas are rare and can easily be misdiagnosed. CONCLUSION Clinical imaging, immunohistochemistry, and molecular pathology should be considered to confirm the diagnosis.
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Affiliation(s)
- Qiao-Ling Hu
- Department of Pathology, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518000, Guangdong Province, China
| | - Chao Zeng
- Department of Pathology, The Eighth Affiliated Hospital of Sun Yat-sen University, Shenzhen 518000, Guangdong Province, China
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4
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Mehreen A, Manjee KG, Paralkar D, Paner GP, Lan T. NKX3.1 Expression in Non-Prostatic Tumors and Characterizing its Expression in Esophageal/Gastroesophageal Adenocarcinoma. Adv Anat Pathol 2024; 31:202-205. [PMID: 38525603 DOI: 10.1097/pap.0000000000000447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
The NKX3.1 immunohistochemical stain is widely recognized as a highly sensitive and specific marker for prostate adenocarcinoma. Nevertheless, its expression has been documented in various nonprostatic tissues and malignancies. This review aims to provide an overview of NKX3.1 expression in diverse tumor types, with a specific focus on its aberrant expression in esophageal/gastroesophageal adenocarcinoma (E/GE-ADC). In our investigation, we explored the expression of NKX3.1 in a series of E/GE-ADC to shed light on its prevalence in this tumor category. A total of 50 samples, comprising primary and metastatic E/GE-ADC specimens from 34 patients, were subjected to immunohistochemical analysis. Stained sections were scored based on the intensity and distribution-categorized as negative, weak, moderate, or strong in either a focal or diffuse pattern. Strong staining corresponds to the intensity observed in normal prostate controls, while focal and diffuse staining denote <50% and ≥50% of tumor nuclei staining positive, respectively. Our semiquantitative scoring revealed that 6 (12%) of the primary and metastatic E/GE-ADC specimens exhibited variable positivity for NKX3.1. This finding suggests that E/GE-ADC can sporadically stain positive for NKX3.1, introducing potential challenges in definitively determining the primary site of origin in certain clinical scenarios. Along with a literature review of NKX3.1 expression in other tumor types, our study provides additional important information about the extent to which this immunostain can be seen in E/GE-ADCs, which, to our knowledge, has not been reported.
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Affiliation(s)
- Ansa Mehreen
- University of Chicago Pritzker School of Medicine, Chicago
- Department of Pathology and Laboratory Medicine, NorthShore University HealthSystem, Evanston, IL
| | - Kiran G Manjee
- University of Chicago Pritzker School of Medicine, Chicago
- Department of Pathology and Laboratory Medicine, NorthShore University HealthSystem, Evanston, IL
| | - Divyangi Paralkar
- Department of Urology, Keck School of Medicine at University of Southern California, Los Angeles, CA
| | | | - Thanh Lan
- University of Chicago Pritzker School of Medicine, Chicago
- Department of Pathology and Laboratory Medicine, NorthShore University HealthSystem, Evanston, IL
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5
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Dehner CA, Lazar AJ, Chrisinger JSA. Updates on WHO classification for small round cell tumors: Ewing sarcoma vs. everything else. Hum Pathol 2024; 147:101-113. [PMID: 38280658 DOI: 10.1016/j.humpath.2024.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/16/2024] [Accepted: 01/22/2024] [Indexed: 01/29/2024]
Abstract
The WHO Classification of Soft Tissue and Bone Tumours currently recognizes four categories of undifferentiated small round cell sarcoma: Ewing sarcoma, round cell sarcoma with EWSR1-non-ETS fusions including NFATc2 and PATZ1, CIC-rearranged sarcoma, and sarcoma with BCOR genetic alterations. These neoplasms frequently pose significant diagnostic challenges due to rarity and overlapping morphologic and immunohistochemical findings. Further, molecular testing, with accompanying pitfalls, may be needed to establish a definitive diagnosis. This review summarizes the clinical, histologic, immunohistochemical, and molecular features of these neoplasms. In addition, differential diagnosis and areas of uncertainty and ongoing investigation are discussed.
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MESH Headings
- Humans
- Sarcoma, Ewing/genetics
- Sarcoma, Ewing/pathology
- Sarcoma, Ewing/classification
- Sarcoma, Ewing/chemistry
- Bone Neoplasms/pathology
- Bone Neoplasms/genetics
- Bone Neoplasms/classification
- Sarcoma, Small Cell/genetics
- Sarcoma, Small Cell/pathology
- Sarcoma, Small Cell/classification
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/analysis
- World Health Organization
- Diagnosis, Differential
- Immunohistochemistry
- Soft Tissue Neoplasms/pathology
- Soft Tissue Neoplasms/genetics
- Soft Tissue Neoplasms/classification
- RNA-Binding Protein EWS/genetics
- Repressor Proteins/genetics
- Gene Rearrangement
- Proto-Oncogene Proteins/genetics
- Predictive Value of Tests
- Phenotype
- Genetic Predisposition to Disease
- Oncogene Proteins, Fusion/genetics
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Affiliation(s)
- Carina A Dehner
- Department of Anatomic Pathology and Laboratory Medicine, Indiana University, 635 Barnhill Drive, Indianapolis, IN, 46202, USA.
| | - Alexander J Lazar
- Department of Pathology, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX, 77030, USA; Department of Genomic Medicine, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX, 77030, USA.
| | - John S A Chrisinger
- Department of Pathology and Immunology, Division of Anatomic and Molecular Pathology, Washington University School of Medicine, 660 S. Euclid Ave, St. Louis, MO, 63110, USA.
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Machado I, Llombart-Bosch A, Charville GW, Navarro S, Domínguez Franjo MP, Bridge JA, Linos K. Sarcomas with EWSR1::Non-ETS Fusion (EWSR1::NFATC2 and EWSR1::PATZ1). Surg Pathol Clin 2024; 17:31-55. [PMID: 38278606 DOI: 10.1016/j.path.2023.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2024]
Abstract
The wide application of increasingly advanced molecular studies in routine clinical practice has allowed a detailed, albeit still incomplete, genetic subclassification of undifferentiated round cell sarcomas. The WHO classification continues to include provisional molecular entities, whose clinicopathologic features are in the early stages of evolution. This review focuses on the clinicopathologic, molecular, and prognostic features of undifferentiated round cell sarcomas with EWSR1/FUS::NFATC2 or EWSR1::PATZ1 fusions. Classic histopathologic findings, uncommon variations, and diagnostic pitfalls are addressed, along with the utility of recently developed immunohistochemical and molecular markers.
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Affiliation(s)
- Isidro Machado
- Pathology Department, Instituto Valenciano de Oncología, Valencia, Spain; Patologika Laboratory, Hospital Quiron-Salud, Valencia, Spain; Pathology Department, University of Valencia, Valencia, Spain.
| | - Antonio Llombart-Bosch
- Pathology Department, university of Valencia, Spain and Cancer CIBER (CIBERONC), Madrid, Spain
| | | | - Samuel Navarro
- Pathology Department, university of Valencia, Spain and Cancer CIBER (CIBERONC), Madrid, Spain
| | | | - Julia A Bridge
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA; Division of Molecular Pathology, ProPath, Dallas, TX, USA
| | - Konstantinos Linos
- Department of Pathology & Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
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7
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Takeda N, Makise N, Kageyama H, Takahashi T, Katoh H, Odaka A, Oikawa M, Sugiyama T, Kawana H, Araki A, Kinoshita H, Hagiwara Y, Kamoda H, Yonemoto T, Itami M. The diagnostic utility of cytology specimen in a case of EWSR1::NFATC2 sarcoma. Virchows Arch 2024; 484:533-538. [PMID: 38483612 DOI: 10.1007/s00428-024-03784-x] [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: 12/27/2023] [Revised: 02/26/2024] [Accepted: 03/10/2024] [Indexed: 04/17/2024]
Abstract
EWSR1::NFATC2 sarcoma, a rare round cell sarcoma constituting the majority of EWSR1::non-ETS sarcomas, has recently been defined in the latest WHO classification. To date, the cytological findings of EWSR1::NFATC2 sarcoma remain undocumented. We present the case of a 25-year-old man with a history of polyostotic fibrous dysplasia in the right leg, referred to our hospital with left thigh pain. Cytological findings included metachromasia, minimally pleomorphic round cells, and eosinophilic infiltration. There was no precursor fibrous dysplasia and the initial diagnosis was undifferentiated pleomorphic sarcoma. Following histologic review, we successfully performed immunocytochemistry and fluorescence in situ hybridization (FISH) on archival cytology specimens. The tumor cells were positive for NKX2-2, NKX3-1, and PAX7 and showed amplified 5' single signals of EWSR1 gene. Reverse transcriptase-polymerase chain reaction revealed an in-frame fusion of EWSR1 and NFATC2. This report describes the cytological features of EWSR1::NFATC2 sarcoma and highlights the diagnostic utility of archival cytology specimens.
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Affiliation(s)
- Naoki Takeda
- Division of Surgical Pathology, Chiba Cancer Center, 666-2 Nitona-Cho, Chuo-Ku, Chiba-Shi, Chiba, 260-8717, Japan
| | - Naohiro Makise
- Division of Surgical Pathology, Chiba Cancer Center, 666-2 Nitona-Cho, Chuo-Ku, Chiba-Shi, Chiba, 260-8717, Japan.
| | - Hajime Kageyama
- Division of Surgical Pathology, Chiba Cancer Center, 666-2 Nitona-Cho, Chuo-Ku, Chiba-Shi, Chiba, 260-8717, Japan
| | - Tsukasa Takahashi
- Division of Surgical Pathology, Chiba Cancer Center, 666-2 Nitona-Cho, Chuo-Ku, Chiba-Shi, Chiba, 260-8717, Japan
| | - Hiroshi Katoh
- Division of Surgical Pathology, Chiba Cancer Center, 666-2 Nitona-Cho, Chuo-Ku, Chiba-Shi, Chiba, 260-8717, Japan
| | - Akiko Odaka
- Division of Surgical Pathology, Chiba Cancer Center, 666-2 Nitona-Cho, Chuo-Ku, Chiba-Shi, Chiba, 260-8717, Japan
| | - Mariko Oikawa
- Division of Surgical Pathology, Chiba Cancer Center, 666-2 Nitona-Cho, Chuo-Ku, Chiba-Shi, Chiba, 260-8717, Japan
| | - Takahiro Sugiyama
- Division of Surgical Pathology, Chiba Cancer Center, 666-2 Nitona-Cho, Chuo-Ku, Chiba-Shi, Chiba, 260-8717, Japan
| | - Hidetada Kawana
- Division of Surgical Pathology, Chiba Cancer Center, 666-2 Nitona-Cho, Chuo-Ku, Chiba-Shi, Chiba, 260-8717, Japan
| | - Akinobu Araki
- Division of Surgical Pathology, Chiba Cancer Center, 666-2 Nitona-Cho, Chuo-Ku, Chiba-Shi, Chiba, 260-8717, Japan
| | | | - Yoko Hagiwara
- Division of Orthopaedic Surgery, Chiba Cancer Center, Chiba, Japan
| | - Hiroto Kamoda
- Division of Orthopaedic Surgery, Chiba Cancer Center, Chiba, Japan
| | - Tsukasa Yonemoto
- Division of Orthopaedic Surgery, Chiba Cancer Center, Chiba, Japan
| | - Makiko Itami
- Division of Surgical Pathology, Chiba Cancer Center, 666-2 Nitona-Cho, Chuo-Ku, Chiba-Shi, Chiba, 260-8717, Japan
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8
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Hiemcke-Jiwa LS, Sumathi VP, Baumhoer D, Smetsers SE, Haveman LM, van Noesel MM, van Langevelde K, Cleven AHG, van de Sande MAJ, Ter Horst SAJ, Kester LA, Flucke U. Small cell osteosarcoma versus fusion-driven round cell sarcomas of bone: retrospective clinical, radiological, pathological, and (epi)genetic comparison with clinical implications. Virchows Arch 2024; 484:451-463. [PMID: 38332052 PMCID: PMC11021258 DOI: 10.1007/s00428-024-03747-2] [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: 10/13/2023] [Revised: 01/16/2024] [Accepted: 01/19/2024] [Indexed: 02/10/2024]
Abstract
Small cell osteosarcoma (SCOS), a variant of conventional high-grade osteosarcoma (COS), may mimic fusion-driven round cell sarcomas (FDRCS) by overlapping clinico-radiological and histomorphological/immunohistochemical characteristics, hampering accurate diagnosis and consequently proper therapy. We retrospectively analyzed decalcified formalin-fixed paraffin-embedded (FFPE) samples of 18 bone tumors primarily diagnosed as SCOS by methylation profiling, fusion gene analysis, and immunohistochemistry.In eight cases, the diagnosis of SCOS was maintained, and in 10 cases it was changed into FDRCS, including three Ewing sarcomas (EWSR1::FLI1 in two cases and no identified fusion gene in the third case), two sarcomas with BCOR alterations (KMT2D::BCOR, CCNB3::BCOR, respectively), three mesenchymal chondrosarcomas (HEY1::NCOA2 in two cases and one case with insufficient RNA quality), and two sclerosing epithelioid fibrosarcomas (FUS::CREBL3 and EWSR1 rearrangement, respectively).Histologically, SCOS usually possessed more pleomorphic cells in contrast to the FDRCS showing mainly monomorphic cellular features. However, osteoid was seen in the latter tumors as well, often associated with slight pleomorphism. Also, the immunohistochemical profile (CD99, SATB2, and BCOR) overlapped.Clinically and radiologically, similarities between SCOS and FDRCS were observed, with by imaging only minimal presence or lack of (mineralized) osteoid in most of the SCOSs.In conclusion, discrimination of SCOS, epigenetically related to COS, versus FDRCS of bone can be challenging but is important due to different biology and therefore therapeutic strategies. Methylation profiling is a reliable and robust diagnostic test especially on decalcified FFPE material. Subsequent fusion gene analysis and/or use of specific immunohistochemical surrogate markers can be used to substantiate the diagnosis.
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Affiliation(s)
- Laura S Hiemcke-Jiwa
- Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands.
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands.
| | | | - Daniel Baumhoer
- Bone Tumor Reference Centre, Institute of Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | | | - Lianne M Haveman
- Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - Max M van Noesel
- Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Division Imaging & Cancer, University Medical Center Utrecht, Utrecht, The Netherlands
| | | | - Arjen H G Cleven
- Department of Pathology, University Medical Center Groningen, Groningen, The Netherlands
| | - Michiel A J van de Sande
- Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Orthopedic Surgery, University Medical Center Leiden, Leiden, The Netherlands
| | - Simone A J Ter Horst
- Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Lennart A Kester
- Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - Uta Flucke
- Princess Maxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Department of Pathology, Radboud University Medical Center, Nijmegen, The Netherlands
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Kosemehmetoglu K, Rekhi B, Erdem ZB, Yildiz AE, Comunoglu N. Clinicopathological Features of Three Rare EWSR1::NFATC2 Sarcomas of Bone and Soft Tissues. Int J Surg Pathol 2024:10668969241228294. [PMID: 38321863 DOI: 10.1177/10668969241228294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Certain undifferentiated round cell sarcomas displaying EWSR1::NFATC2 fusion have recently been reported, mostly in the bones. This report presents clinicopathological features of 3 additional EWSR1::NFATC2 fusion sarcomas of bone and soft tissues. We present 2 soft tissue and 1 bone tumors: A 62-year-old man with pain and a slowly growing, 8-cm-sized soft tissue mass in the anterolateral compartment of his right calf, along with multiple pulmonary metastatic lesions; a 63-year-old man with a 5-cm sized axillary mass of 4 months duration and a cystic renal mass; and a 53-year-old man with a complaint of leg pain was found to have a 2-cm diameter, intramedullary, lytic mass in the diaphysis of his left femur. Microscopic examination of the tumors in all patients revealed round to epithelioid cells arranged in cords and trabeculae in a myxohyaline stroma. Immunohistochemically, the tumor cells were positive for MIC2/CD99 (3/3), EMA (3/3), NKX3.1 (3/3), NKX2.2 (2/2), CD10 (2/2), and aggrecan (1/1), while negative for S100P and GFAP. Various keratins were also negative except focal AE1/AE3 positivity in the third tumor. By fluorescence in-situ hybridization, 2 tumors (#1 and #3) revealed EWSR1 gene rearrangement and amplification. Furthermore, 2 tumors (#1 and #2) displayed EWSR1ex8::NFATC2ex3 fusion with next-generation sequencing (NGS). The first patient was offered chemotherapy. However, he died of pulmonary metastasis. This report highlights the value of combining histopathological features and immunostains such as NXK3.1, NKX2.2, CD10, and aggrecan, along with EWSR1 testing for triaging these tumors for rare gene fusions by NGS that has prognostic implications.
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Affiliation(s)
- Kemal Kosemehmetoglu
- Department of Pathology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Bharat Rekhi
- Department of Surgical Pathology, Tata Memorial Hospital, Parel, Mumbai, India
| | - Zeynep Betul Erdem
- Department of Pathology, Basaksehir Cam and Sakura City Hospital, Istanbul, Turkey
| | - Adalet Elcin Yildiz
- Department of Radiology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Nil Comunoglu
- Department of Pathology, Istanbul University, Cerrahpasa Faculty of Medicine, Istanbul, Turkey
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10
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Liu L, Li L, Ding Y, Kong F, Mo W, Ye H, Shen D. Report and literature review of four cases of EWSR1::NFATC2 round cell sarcoma. Diagn Pathol 2024; 19:19. [PMID: 38254207 PMCID: PMC10801936 DOI: 10.1186/s13000-024-01443-y] [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: 12/17/2023] [Accepted: 01/12/2024] [Indexed: 01/24/2024] Open
Abstract
BACKGROUND EWSR1::NFATC2 rearranged sarcomas are a group of rare round, undifferentiated sarcomas with clinicopathological features different from those of Ewing's sarcoma (ES) family and other non-ES sarcomas. We report 4 cases of this rare sarcoma and review their features. MATERIALS AND METHODS Four cases of EWSR1::NFATC2 rearranged round cell sarcoma of the bone from the Pathology Department of Peking University People's Hospital were retrospectively studied. Clinical and pathological data were summarized, and immunohistochemical staining, fluorescence in situ hybridization (FISH), and Next-generation sequencing (NGS) were performed. Relevant literature reports were also reviewed. RESULTS Among the four cases of EWSR1::NFATC2 rearranged round cell sarcoma, three were male, and one was female, with the age ranged from 14 to 34 years old at diagnosis (mean age: 27.5 years). All tumors were located in the femur and ranged in size from 4 to 8cm (mean 6cm), involving the surrounding soft tissues. All four patients underwent surgical treatment, and three received chemotherapy and radiotherapy postoperatively. Follow-up results showed that all four patients were alive. Histologically, the tumors exhibited small round cell sarcoma phenotype, with the stroma rich in mucin or exhibiting a glassy appearance. The tumor cells diffusely expressed CD99, NKX2.2, NKX3.1 and focal expression of CK and EMA was observed. FISH analysis showed that EWSR1 gene rearrangement was detected in all 4 cases, accompanied by 5' locus amplification. EWSR1::NFATC2 fusion probe demonstrated multi yellow fusion signals. NGS identified EWSR1::NFATC2 breakpoints in exon 9 and exon 3 in all 4 cases. The average follow-up duration of the study group was 88 months (range from 26-180 months). One case experienced both local recurrence and metastasis to the lung and chest wall. One case presented with local recurrence. The remaining two cases did not have the recurrence or metastasis. CONCLUSION Although the disease can locally recur and metastasize to the lungs, its mortality rate is significantly lower than that of Ewing sarcoma and other high-grade small round cell undifferentiated sarcomas. Therefore, it supports to classify this tumor as a separate subtype of small round cell sarcoma.
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Affiliation(s)
- Lili Liu
- Department of Pathology, Peking University People's Hospital, Beijing, People's Republic of China
| | - Lan Li
- Department of Pathology, Beijing Jishuitan Hospital, The Fourth Medical College of Peking University, Beijing, People's Republic of China
| | - Yi Ding
- Department of Pathology, Beijing Jishuitan Hospital, The Fourth Medical College of Peking University, Beijing, People's Republic of China
| | - Fangzhou Kong
- Department of Pathology, Peking University People's Hospital, Beijing, People's Republic of China
| | - Wenfa Mo
- Department of Pathology, Affiliated Hospital of Guilin Medical University, Guilin, People's Republic of China
| | - Hongtao Ye
- Department of Histopathology, Royal National Orthopaedic Hospital NHS Trust, Brockley Hill, Stanmore, Middlesex, HA7 4LP, UK.
| | - Danhua Shen
- Department of Pathology, Peking University People's Hospital, Beijing, People's Republic of China.
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11
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Zhong J, Wang Q, Xie Y, Niu Z, Zhou D. Detection of mesenchymal chondrosarcoma in pleural effusion with immunocytochemistry and determination of HEY1::NCOA2 fusion by next-generation sequencing on cell block. Cytopathology 2024; 35:149-152. [PMID: 37688410 DOI: 10.1111/cyt.13296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 07/29/2023] [Accepted: 08/14/2023] [Indexed: 09/10/2023]
Abstract
Mesenchymal chondrosarcoma (MC) is a rare but extremely aggressive type of chondrosarcoma distinguished by the presence of both primitive mesenchymal cells and fully developed chondroid tissue. The identification of a biphasic morphology in pleural effusion, along with detection of the HEY1::NCOA2 fusion using next-generation sequencing, serve as vital indicators for an accurate diagnosis.
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Affiliation(s)
- Jingmin Zhong
- Pathology Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qingjie Wang
- Pathology Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yilin Xie
- Pathology Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhaorong Niu
- Pathology Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Diwei Zhou
- Pathology Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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12
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Tsuchie H, Umakoshi M, Hasegawa T, Nagasawa H, Okada K, Nanjyo H, Goto A, Miyakoshi N. Soft tissue round cell sarcoma of the abdominal wall, with EWSR1-non-ETS fusion (EWSR1-NFATC2 sarcoma): A case report and literature review emphasizing its clinical features. J Orthop Sci 2024; 29:374-378. [PMID: 35430129 DOI: 10.1016/j.jos.2022.02.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 02/09/2022] [Accepted: 02/23/2022] [Indexed: 02/09/2023]
Affiliation(s)
- Hiroyuki Tsuchie
- Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan.
| | - Michinobu Umakoshi
- Department of Cellular and Organ Pathology, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan
| | - Tadashi Hasegawa
- Department of Surgical Pathology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo 060-8543, Japan
| | - Hiroyuki Nagasawa
- Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan
| | - Kyoji Okada
- Department of Physical Therapy, Akita University Graduate School of Health Sciences, 1-1-1 Hondo, Akita 010-8543, Japan
| | - Hiroshi Nanjyo
- Division of Surgical Pathology, Akita University Hospital, 1-1-1 Hondo, Akita 010-8543, Japan
| | - Akiteru Goto
- Department of Cellular and Organ Pathology, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan
| | - Naohisa Miyakoshi
- Department of Orthopedic Surgery, Akita University Graduate School of Medicine, 1-1-1 Hondo, Akita 010-8543, Japan
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13
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Gouda MA, Zarzour MA, Vaporciyan AA, Kairemo K, Chuang HH, Subbiah V. Activity of pazopanib in EWSR1-NFATC2 translocation-associated bone sarcoma. Oncoscience 2023; 10:44-53. [PMID: 37736255 PMCID: PMC10511123 DOI: 10.18632/oncoscience.587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 08/21/2023] [Indexed: 09/23/2023] Open
Abstract
Pazopanib is a multi-kinase inhibitor that is currently approved for treatment of advanced renal cell carcinoma and chemotherapy-refractory soft tissue sarcoma. In this case report, we discuss the case of a patient with a EWSR1-NFATC2 fusion positive bone sarcoma who had exceptional tumor control through using pazopanib and surgery for an overall duration exceeding 5 years. We also review the literature on EWSR1-NFATC2 translocation-associated sarcomas and use of pazopanib in bone sarcomas.
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Affiliation(s)
- Mohamed A. Gouda
- Department of Investigational Cancer Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Maria A. Zarzour
- Department of Sarcoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Ara A. Vaporciyan
- Department of Thoracic and Cardiovascular Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Kalevi Kairemo
- Department of Nuclear Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Hubert H. Chuang
- Department of Nuclear Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Vivek Subbiah
- Department of Investigational Cancer Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
- Sarah Cannon Research Institute, Nashville, TN 37203, USA
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14
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Dudzisz-Śledź M, Kondracka M, Rudzińska M, Zając AE, Firlej W, Sulejczak D, Borkowska A, Szostakowski B, Szumera-Ciećkiewicz A, Piątkowski J, Rutkowski P, Czarnecka AM. Mesenchymal Chondrosarcoma from Diagnosis to Clinical Trials. Cancers (Basel) 2023; 15:4581. [PMID: 37760551 PMCID: PMC10527018 DOI: 10.3390/cancers15184581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 09/08/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
Mesenchymal chondrosarcoma (MCS) is a rare subtype of chondrosarcoma with a poor prognosis. Although these tumors are sensitive to radiotherapy/chemotherapy, the standard treatment for localized MCS is only surgical resection, and there are no established treatment guidelines for patients with advanced and metastatic MCS. Due to the low incidence of MCS, the pathology of these tumors is still unknown, and other therapeutic options are lacking. Some studies show the potential role of the PDGF/PPI3K/AKT, PKC/RAF/MEK/ERK, and pRB pathways, and BCL2 overexpression in the pathogenesis of MCS. These findings provide an opportunity to use protein kinases and BCL2 inhibitors as potential therapy in MCS. In this review, we summarize the current knowledge about MCS diagnosis and treatment options. We show the immunological and molecular biomarkers used in the diagnosis of MCS. In addition, we discuss the known prognostic and predictive factors in MCS. Finally, we present the novel trends, including targeted therapies and ongoing clinical trials using protein kinase inhibitors and the death receptor 5 (DR5) agonist, which may be the focus of future MCS treatment studies.
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Affiliation(s)
- Monika Dudzisz-Śledź
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (M.D.-Ś.); (M.K.); (M.R.); (A.E.Z.); (W.F.); (A.B.); (B.S.); (P.R.)
| | - Monika Kondracka
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (M.D.-Ś.); (M.K.); (M.R.); (A.E.Z.); (W.F.); (A.B.); (B.S.); (P.R.)
- Faculty of Medicine, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Monika Rudzińska
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (M.D.-Ś.); (M.K.); (M.R.); (A.E.Z.); (W.F.); (A.B.); (B.S.); (P.R.)
- Faculty of Medicine, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Agnieszka E. Zając
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (M.D.-Ś.); (M.K.); (M.R.); (A.E.Z.); (W.F.); (A.B.); (B.S.); (P.R.)
| | - Wiktoria Firlej
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (M.D.-Ś.); (M.K.); (M.R.); (A.E.Z.); (W.F.); (A.B.); (B.S.); (P.R.)
- Faculty of Medicine, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Dorota Sulejczak
- Department of Experimental Pharmacology, Mossakowski Medical Research Centre Polish Academy of Sciences, 02-106 Warsaw, Poland;
| | - Aneta Borkowska
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (M.D.-Ś.); (M.K.); (M.R.); (A.E.Z.); (W.F.); (A.B.); (B.S.); (P.R.)
| | - Bartłomiej Szostakowski
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (M.D.-Ś.); (M.K.); (M.R.); (A.E.Z.); (W.F.); (A.B.); (B.S.); (P.R.)
| | - Anna Szumera-Ciećkiewicz
- Department of Pathology, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland;
- Department of Diagnostic Hematology, Institute of Hematology and Transfusion Medicine, 02-776 Warsaw, Poland
| | - Jakub Piątkowski
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, 02-106 Warsaw, Poland;
| | - Piotr Rutkowski
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (M.D.-Ś.); (M.K.); (M.R.); (A.E.Z.); (W.F.); (A.B.); (B.S.); (P.R.)
| | - Anna M. Czarnecka
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, 02-781 Warsaw, Poland; (M.D.-Ś.); (M.K.); (M.R.); (A.E.Z.); (W.F.); (A.B.); (B.S.); (P.R.)
- Department of Experimental Pharmacology, Mossakowski Medical Research Centre Polish Academy of Sciences, 02-106 Warsaw, Poland;
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15
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Sharma AE, Kerr DA, Cipriani NA. Small biopsies in the head and neck: Bone and soft tissue. Semin Diagn Pathol 2023; 40:353-370. [PMID: 37453847 DOI: 10.1053/j.semdp.2023.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 04/30/2023] [Accepted: 06/21/2023] [Indexed: 07/18/2023]
Abstract
Bone and soft tissue lesions in the head and neck encompass not only a broad morphologic spectrum but also significant inherent clinicopathologic overlap. Epidemiology, radiology, and location - similar to the diagnostic assessment in other sites - are especially important considerations in the context of an established mesenchymal proliferation. Herein, the approach towards diagnosis is stratified by morphology (spindle, sarcomatoid, epithelioid, round cell), cellular lineage (fibroblastic, nerve sheath, rhabdomyogenic), and tumor grade (benign, low- to high-grade malignant) as the basis of further immunohistochemical or molecular investigation.
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Affiliation(s)
- Aarti E Sharma
- Hospital for Special Surgery, New York, NY, United States
| | - Darcy A Kerr
- Dartmouth Hitchcock Medical Center, Lebanon, NH, United States
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16
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Patel S, Wald AI, Bastaki JM, Chiosea SI, Singhi AD, Seethala RR. NKX3.1 Expression and Molecular Characterization of Secretory Myoepithelial Carcinoma (SMCA): Advancing the Case for a Salivary Mucous Acinar Phenotype. Head Neck Pathol 2023; 17:467-478. [PMID: 36746884 PMCID: PMC10293155 DOI: 10.1007/s12105-023-01524-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 01/05/2023] [Indexed: 02/08/2023]
Abstract
BACKGROUND Secretory myoepithelial carcinomas (SMCA) are rare, mucinous, signet ring predominant tumors with primitive myoepithelial features. While many mucinous salivary gland tumors have now been molecularly characterized, key drivers in SMCA have yet to be elucidated. Recently, NKX3.1, a homeodomain transcription factor implicated in salivary mucous acinar development was also shown in a subset of salivary mucinous neoplasms, salivary intraductal papillary mucinous neoplasms (SG-IPMN). To date, NKX3.1 expression has not been characterized in other mucinous salivary lesions. Here, we report molecular and extended immunophenotypic findings in SMCA and NKX3.1 expression in the context of other head and neck lesions. METHODS We retrieved 4 previously reported SMCA, performed additional immunohistochemical and targeted next-generation sequencing (NGS). We also investigated the use of NKX3.1 as a marker for SMCA in the context of its prevalence and extent (using H-score) in a mixed cohort of retrospectively and prospectively tested head and neck lesions (n = 223) and non-neoplastic tissues (n = 66). RESULTS NKX3.1 positivity was confirmed in normal mucous acini as well as in mucous acinar class of lesions (5/6, mean H-score: 136.7), including mucinous adenocarcinomas (3/4), SG-IPMN (1/1), and microsecretory adenocarcinoma (MSA) (1/1). All SMCA were positive. Fluorescence in situ hybridization for SS18 rearrangements were negative in all successfully tested cases (0/3). NGS was successful in two cases (cases 3 and 4). Case 3 demonstrated a PTEN c.655C>T p.Q219* mutation and a SEC16A::NOTCH1 fusion while case 4 (clinically aggressive) showed a PTEN c.1026+1G>A p.K342 splice site variant, aTP53 c.524G>A p.R175H mutation and a higher tumor mutation burden (29 per Mb). PTEN immunohistochemical loss was confirmed in both cases and a subset of tumor cells showed strong (extreme) staining for P53 in Case 4. CONCLUSION Despite a partial myoepithelial phenotype, SMCA, along with mucinous adenocarcinomas/SG-IPMN and MSA, provisionally constitute a mucous acinar class of tumors based on morphology and NKX3.1 expression. Like salivary mucinous adenocarcinomas/SG-IPMN, SMCA also show alterations of the PTEN/PI3K/AKT pathway and may show progressive molecular alterations. We document the first extramammary tumor with a SEC16A::NOTCH1 fusion.
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Affiliation(s)
- Simmi Patel
- Department of Pathology and Laboratory Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
| | - Abigail I Wald
- Department of Pathology and Laboratory Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Jassem M Bastaki
- Al-Sabah Hospital and Kuwait Cancer Control Center, Ministry of Health, Kuwait City, Kuwait
| | - Simon I Chiosea
- Department of Pathology and Laboratory Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Aatur D Singhi
- Department of Pathology and Laboratory Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Raja R Seethala
- Department of Pathology and Laboratory Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
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17
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Zhong LL, Huang GX, Xian LY, Wei ZC, Tang ZP, Chen QY, Chen H, Tang F. Novel characteristics for immunophenotype, FISH pattern and molecular cytogenetics in synovial sarcoma. Sci Rep 2023; 13:7954. [PMID: 37193761 DOI: 10.1038/s41598-023-34983-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 05/10/2023] [Indexed: 05/18/2023] Open
Abstract
As a rare and highly aggressive soft tissue sarcoma, the new immunophenotype, atypical FISH pattern and relevant molecular cytogenetics of synovial sarcoma (SS) remain less known, although it is characteristically represented by a pathognomonic chromosomal translocation t (X; 18) (p11.2; q11.2). Methodologically, the morphology was retrospectively analysed by using H&E staining, and immunohistochemical features were investigated by using markers that have been recently applied in other soft tissue tumors. Moreover, FISH signals for SS18 and EWSR-1 break-apart probes were examined. Finally, cytogenetic characteristics were analysed via RT-PCR and Sanger sequencing. Consequently, nine out of thirteen cases that were histologically highly suspected as SS were finally identified as SS via molecular analysis. Histologically, nine SS cases were divided into monophasic fibrous SS (4/9), biphasic SS (4/9) and poorly differentiated SS (1/9). Immunohistochemically, SOX-2 immunostaining was positive in eight cases (8/9) and PAX-7 immunostaining was diffusely positive in the epithelial component of biphasic SS (4/4). Nine cases showed negative immunostaining for NKX3.1 and reduced or absent immunostaining for INI-1. Eight cases showed typically positive FISH signalling for the SS18 break-apart probe, whereas one case exhibited an atypical FISH pattern (complete loss of green signalling, case 2). Furthermore, the SS18-SSX1 and SS18-SSX2 fusion genes were identified in seven cases and two cases, respectively. The fusion site in 8 out of 9 cases was common in the literature, whereas the fusion site in case 2 was involved in exon 10 codon 404 in SS18 and exon 7 codon 119 in SSX1 (which has not been previously reported), which notably corresponded to the complete loss of green signalling in the FISH pattern. Additionally, FISH analysis of the EWSR-1 gene in nine SS cases demonstrated aberrant signalling in three cases that were recognized as a monoallelic loss of EWSR-1 (1/9), an amplification of EWSR-1 (1/9) and a translocation of EWSR-1 (1/9). In conclusion, SS18-SSX fusion gene sequencing is obligatory for a precise diagnosis of SS when dealing with a confusing immunophenotype and atypical or aberrant FISH signalling for SS18 and EWSR-1 detection.
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Affiliation(s)
- Ling Ling Zhong
- Department of Pathology, The 924th Hospital of the Chinese People's Liberation Army Joint Logistic Support Force, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, 541002, Guangxi, China
- Guangxi Key Laboratory of Glucose and Lipid Metabolic Diseases, The Second Affiliated Hospital of Guilin Medical University, Guilin, 541199, Guangxi, China
| | - Gao Xiang Huang
- Department of Pathology, The 924th Hospital of the Chinese People's Liberation Army Joint Logistic Support Force, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, 541002, Guangxi, China
| | - Li Ying Xian
- Department of Pathology and Laboratory Medicine, Dongguan Affiliated Hospital of Southern Medical University, Dongguan, 523059, Guangdong, China
| | - Zong Chen Wei
- Department of Pathology, The 924th Hospital of the Chinese People's Liberation Army Joint Logistic Support Force, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, 541002, Guangxi, China
| | - Zhi Ping Tang
- Department of Pathology, The 924th Hospital of the Chinese People's Liberation Army Joint Logistic Support Force, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, 541002, Guangxi, China
| | - Qiu Yue Chen
- Department of Pathology, The 924th Hospital of the Chinese People's Liberation Army Joint Logistic Support Force, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, 541002, Guangxi, China
| | - Hao Chen
- Department of Pathology, The 924th Hospital of the Chinese People's Liberation Army Joint Logistic Support Force, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, 541002, Guangxi, China
| | - Fang Tang
- Department of Pathology, The 924th Hospital of the Chinese People's Liberation Army Joint Logistic Support Force, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, 541002, Guangxi, China.
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18
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Glauser S, Ameline B, Andrei V, Harder D, Pauli C, Trautmann M, Hartmann W, Baumhoer D. NKX3.1 immunohistochemistry and methylome profiling in mesenchymal chondrosarcoma: additional diagnostic value for a well-defined disease? Pathology 2023:S0031-3025(23)00117-4. [PMID: 37225644 DOI: 10.1016/j.pathol.2023.03.003] [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: 11/23/2022] [Revised: 01/26/2023] [Accepted: 03/01/2023] [Indexed: 05/26/2023]
Abstract
Mesenchymal chondrosarcoma (MCS) is a rare and highly aggressive tumour of soft tissue and bone that is defined by an underlying and highly specific fusion transcript involving HEY1 and NCOA2. Histologically, the tumours show a biphasic appearance consisting of an undifferentiated blue and round cell component as well as islands of highly differentiated cartilage. Particularly in core needle biopsies, the chondromatous component can be missed and the non-specific morphology and immunophenotype of the round cell component can cause diagnostic challenges. We applied NKX3.1 immunohistochemistry which was recently reported as a highly specific marker as well as methylome and copy number profiling to a set of 45 well characterised MCS cases to evaluate their potential diagnostic value. Methylome profiling revealed a highly distinct cluster for MCS. Notably, the findings were reproducible also when analysing the round cell and cartilaginous component separately. Furthermore, four outliers were identified by methylome profiling for which the diagnosis had to be revised. NKX3.1 immunohistochemistry showed positivity in 36% of tumours, the majority of which was rather focal and weak. Taken together, NKX3.1 expression showed a low sensitivity but a high specificity in our analysis. Methylome profiling on the other hand represents a sensitive, specific and reliable tool to support the diagnosis of MCS, particularly if only the round cell component is obtained in a biopsy and the diagnosis is not suspected. Furthermore, it can aid in confirming the diagnosis in case RNA sequencing for the HEY1::NCOA2 fusion transcript is not available.
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Affiliation(s)
- Salomé Glauser
- Bone Tumour Reference Centre, Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Baptiste Ameline
- Bone Tumour Reference Centre, Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Vanghelita Andrei
- Bone Tumour Reference Centre, Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Dorothee Harder
- Department of Radiology, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Chantal Pauli
- Department of Pathology and Molecular Pathology, University Hospital Zurich, Zurich, Switzerland; University of Zurich, Zurich, Switzerland
| | - Marcel Trautmann
- Gerhard-Domagk-Institute of Pathology, University Hospital Münster, Münster, Germany; Division of Translational Pathology, Gerhard-Domagk-Institute of Pathology, University Hospital Münster, Münster, Germany
| | - Wolfgang Hartmann
- Gerhard-Domagk-Institute of Pathology, University Hospital Münster, Münster, Germany; Division of Translational Pathology, Gerhard-Domagk-Institute of Pathology, University Hospital Münster, Münster, Germany
| | - Daniel Baumhoer
- Bone Tumour Reference Centre, Institute of Medical Genetics and Pathology, University Hospital Basel, University of Basel, Basel, Switzerland.
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19
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Uemura K, Komatsu M, Hara S, Kawamoto T, Bitoh Y, Itoh T, Hirose T. CYP1A1 Is a Useful Diagnostic Marker for Angiofibroma of Soft Tissue. Am J Surg Pathol 2023; 47:547-557. [PMID: 36876749 DOI: 10.1097/pas.0000000000002029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
Angiofibroma of soft tissue (AFST) is a recently described benign fibroblastic neoplasm composed of uniform bland spindle cell proliferation in fibrous and fibromyxoid stroma with prominent thin-walled small branching vessels. A major recurrent genetic abnormality in AFST is t(5;8)(p15;q13), which results in the rearrangement of AHRR and NCOA2 . Owing to a lack of discriminatory IHC markers and potential overlap with other mesenchymal neoplasms, it may be difficult to confirm the diagnosis of AFST in some cases. Triggered by a recent gene expression profile study of AFST, which showed the significant upregulation of AhR/AHRR/ARNT downstream genes (including CYP1A1 ), we used a mouse monoclonal antibody to explore the diagnostic significance of CYP1A1 expression in histologically confirmed AFST cases along with 224 control cases, consisting of 221 neoplastic mimickers and 3 non-neoplastic lesions. We found moderate to strong cytoplasmic expression of CYP1A1 in 13 of 16 AFST cases (sensitivity, 81.3%). In contrast, the vast majority of other examined histologic mimickers exhibited no expression of CYP1A1 (specificity, 97.3%), except for 3 myxofibrosarcomas (3/31), 2 solitary fibrous tumors (2/22), and 2 neurofibroma (1/27). Our results indicate that CYP1A1 immunohistochemistry may aid in the diagnosis of AFST by distinguishing among various kinds of tumors, particularly those harboring prominent vasculature.
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Affiliation(s)
- Kotaro Uemura
- Departments of Diagnostic Pathology
- Pediatric Surgery
| | | | - Shigeo Hara
- Department of Diagnostic Pathology, Kobe City Medical Center General Hospital
| | - Teruya Kawamoto
- Orthopedic Surgery
- Division of Orthopedic Surgery, Kobe University International Clinical Cancer Research Center, Kobe
| | | | | | - Takanori Hirose
- Division of Pathology for Regional Communication, Kobe University Graduate School of Medicine
- Department of Diagnostic Pathology, Hyogo Cancer Center, Akashi, Hyogo Prefecture, Japan
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20
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Choi JH, Ro JY. The Recent Advances in Molecular Diagnosis of Soft Tissue Tumors. Int J Mol Sci 2023; 24:ijms24065934. [PMID: 36983010 PMCID: PMC10051446 DOI: 10.3390/ijms24065934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/17/2023] [Accepted: 03/19/2023] [Indexed: 03/30/2023] Open
Abstract
Soft tissue tumors are rare mesenchymal tumors with divergent differentiation. The diagnosis of soft tissue tumors is challenging for pathologists owing to the diversity of tumor types and histological overlap among the tumor entities. Present-day understanding of the molecular pathogenesis of soft tissue tumors has rapidly increased with the development of molecular genetic techniques (e.g., next-generation sequencing). Additionally, immunohistochemical markers that serve as surrogate markers for recurrent translocations in soft tissue tumors have been developed. This review aims to provide an update on recently described molecular findings and relevant novel immunohistochemical markers in selected soft tissue tumors.
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Affiliation(s)
- Joon Hyuk Choi
- Department of Pathology, Yeungnam University College of Medicine, 170 Hyeonchung-ro, Namgu, Daegu 42415, Republic of Korea
| | - Jae Y Ro
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, Weill Medical College, Cornell University, Houston, TX 77030, USA
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21
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Tlemsani C, Larousserie F, De Percin S, Audard V, Hadjadj D, Chen J, Biau D, Anract P, Terris B, Goldwasser F, Pasmant E, Boudou-Rouquette P. Biology and Management of High-Grade Chondrosarcoma: An Update on Targets and Treatment Options. Int J Mol Sci 2023; 24:ijms24021361. [PMID: 36674874 PMCID: PMC9862566 DOI: 10.3390/ijms24021361] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/19/2022] [Accepted: 12/26/2022] [Indexed: 01/13/2023] Open
Abstract
This review provides an overview of histopathology, clinical presentation, molecular pathways, and potential new systemic treatments of high-grade chondrosarcomas (CS), including grade 2−3 conventional, dedifferentiated, and mesenchymal CS. The diagnosis of CS combines radiological and histological data in conjunction with patient clinical presentations. Conventional CS is the most frequent subtype of CS (85%) and represents about 25% of primary bone tumors in adults; they can be categorized according to their bone location into central, peripheral, and periosteal chondrosarcomas. Central and peripheral CS differ at the molecular level with either IDH1/2 mutations or EXT1/2 mutations, respectively. CDKN2A/B deletions are also frequent in conventional CS, as well as COL2A1 mutations. Dedifferentiated CS develops when low-grade conventional CS transforms into a high-grade sarcoma and most frequently exhibits features of osteosarcoma, fibrosarcoma, or undifferentiated pleomorphic sarcoma. Their molecular characteristics are similar to conventional CS. Mesenchymal CS is a totally different pathological entity exhibiting recurrent translocations. Their clinical presentation and management are different too. The standard treatment of CSs is wide en-bloc resection. CS are relatively radiotherapy resistant; therefore, doses >60 Gy are needed in an attempt to achieve local control in unresectable tumors. Chemotherapy is possibly effective in mesenchymal chondrosarcoma and is of uncertain value in dedifferentiated chondrosarcoma. Due to resistance to standard anticancer agents, the prognosis is poor in patients with metastatic or unresectable chondrosarcomas. Recently, the refined characterization of the molecular profile, as well as the development of new treatments, allow new therapeutic options for these rare tumors. The efficiency of IDH1 inhibitors in other malignancies suggests that these inhibitors will be part of IDH1/2 mutated conventional CS management soon. Other treatment approaches, such as PIK3-AKT-mTOR inhibitors, cell cycle inhibitors, and epigenetic or immune modulators based on improving our understanding of CS molecular biology, are emerging.
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Affiliation(s)
- Camille Tlemsani
- Department of Medical Oncology, Cochin Hospital, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
- INSERM U1016-CNRS UMR8104, Cochin Institute, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
| | - Frédérique Larousserie
- Department of Pathology, Cochin Hospital, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
| | - Sixtine De Percin
- Department of Medical Oncology, Cochin Hospital, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
| | - Virginie Audard
- Department of Pathology, Cochin Hospital, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
| | - Djihad Hadjadj
- INSERM U1016-CNRS UMR8104, Cochin Institute, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
| | - Jeanne Chen
- Department of Medical Oncology, Cochin Hospital, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
| | - David Biau
- Department of Orthopedic Surgery, Cochin Hospital, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
| | - Philippe Anract
- Department of Orthopedic Surgery, Cochin Hospital, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
| | - Benoit Terris
- Department of Pathology, Cochin Hospital, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
| | - François Goldwasser
- Department of Medical Oncology, Cochin Hospital, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
| | - Eric Pasmant
- INSERM U1016-CNRS UMR8104, Cochin Institute, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
- Department of Genetics, Cochin Hospital, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
| | - Pascaline Boudou-Rouquette
- Department of Medical Oncology, Cochin Hospital, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
- INSERM U1016-CNRS UMR8104, Cochin Institute, Paris Cancer Institute CARPEM, Université Paris Cité, APHP.Centre, 75014 Paris, France
- Correspondence: ; Tel.: +33-1-58-41-23-30; Fax: +33-1-58-41-14-34
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Yoshida A. Ewing and Ewing-like sarcomas: A morphological guide through genetically-defined entities. Pathol Int 2023; 73:12-26. [PMID: 36484765 PMCID: PMC10107474 DOI: 10.1111/pin.13293] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Accepted: 11/15/2022] [Indexed: 12/14/2022]
Abstract
The fifth edition of the World Health Organization classification of soft tissue and bone tumors redefined Ewing sarcoma by fusions between EWSR1/FUS and ETS family of transcription factors, and recognized three tumor groups among Ewing-like sarcoma: CIC-rearranged sarcoma, sarcoma with BCOR genetic alterations, and round cell sarcoma with EWSR1::non-ETS fusions. Although this classification underscores the critical role of molecular genetics in the diagnosis of small round cell sarcoma, each entry is recognized as a specific entity not only because they have different genetics but because their phenotypes are distinct and reasonably robust to support the diagnosis. This review focuses on the morphological aspects of Ewing sarcoma and a subset of Ewing-like sarcomas (CIC-rearranged sarcoma, BCOR-associated sarcoma, and EWSR1::NFATC2 sarcoma) for which phenotypic characteristics have been well established. Classic histological findings, uncommon variations, and recurrent diagnostic pitfalls are addressed, along with the utility of recently developed immunohistochemical markers (NKX2.2, PAX7, ETV4, BCOR, CCNB3, and NKX3.1). Phenotypic expertise would significantly expedite the diagnostic process and complement (or sometimes outperform) genetic testing, even in well-resourced settings. Morphological knowledge plays an even more substantial role in facilities that do not have easy access to molecular testing.
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Affiliation(s)
- Akihiko Yoshida
- Department of Diagnostic Pathology, National Cancer Center Hospital, Tokyo, Japan.,Rare Cancer Center, National Cancer Center, Tokyo, Japan
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23
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Abstract
Undifferentiated small round cell sarcomas (SRCSs) of bone and soft tissue comprise a heterogeneous group of highly aggressive tumours associated with a poor prognosis, especially in metastatic disease. SRCS entities mainly occur in the third decade of life and can exhibit striking disparities regarding preferentially affected sex and tumour localization. SRCSs comprise new entities defined by specific genetic abnormalities, namely EWSR1-non-ETS fusions, CIC-rearrangements or BCOR genetic alterations, as well as EWSR1-ETS fusions in the prototypic SRCS Ewing sarcoma. These gene fusions mainly encode aberrant oncogenic transcription factors that massively rewire the transcriptome and epigenome of the as yet unknown cell or cells of origin. Additional mutations or copy number variants are rare at diagnosis and, depending on the tumour entity, may involve TP53, CDKN2A and others. Histologically, these lesions consist of small round cells expressing variable levels of CD99 and specific marker proteins, including cyclin B3, ETV4, WT1, NKX3-1 and aggrecan, depending on the entity. Besides locoregional treatment that should follow standard protocols for sarcoma management, (neo)adjuvant treatment is as yet ill-defined but generally follows that of Ewing sarcoma and is associated with adverse effects that might compromise quality of life. Emerging studies on the molecular mechanisms of SRCSs and the development of genetically engineered animal models hold promise for improvements in early detection, disease monitoring, treatment-related toxicity, overall survival and quality of life.
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mRNA Capture Sequencing and RT-qPCR for the Detection of Pathognomonic, Novel, and Secondary Fusion Transcripts in FFPE Tissue: A Sarcoma Showcase. Int J Mol Sci 2022; 23:ijms231911007. [PMID: 36232302 PMCID: PMC9569610 DOI: 10.3390/ijms231911007] [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: 08/09/2022] [Revised: 09/12/2022] [Accepted: 09/12/2022] [Indexed: 11/17/2022] Open
Abstract
We assess the performance of mRNA capture sequencing to identify fusion transcripts in FFPE tissue of different sarcoma types, followed by RT-qPCR confirmation. To validate our workflow, six positive control tumors with a specific chromosomal rearrangement were analyzed using the TruSight RNA Pan-Cancer Panel. Fusion transcript calling by FusionCatcher confirmed these aberrations and enabled the identification of both fusion gene partners and breakpoints. Next, whole-transcriptome TruSeq RNA Exome sequencing was applied to 17 fusion gene-negative alveolar rhabdomyosarcoma (ARMS) or undifferentiated round cell sarcoma (URCS) tumors, for whom fluorescence in situ hybridization (FISH) did not identify the classical pathognomonic rearrangements. For six patients, a pathognomonic fusion transcript was readily detected, i.e., PAX3-FOXO1 in two ARMS patients, and EWSR1-FLI1, EWSR1-ERG, or EWSR1-NFATC2 in four URCS patients. For the 11 remaining patients, 11 newly identified fusion transcripts were confirmed by RT-qPCR, including COPS3-TOM1L2, NCOA1-DTNB, WWTR1-LINC01986, PLAA-MOB3B, AP1B1-CHEK2, and BRD4-LEUTX fusion transcripts in ARMS patients. Additionally, recurrently detected secondary fusion transcripts in patients diagnosed with EWSR1-NFATC2-positive sarcoma were confirmed (COPS4-TBC1D9, PICALM-SYTL2, SMG6-VPS53, and UBE2F-ALS2). In conclusion, this study shows that mRNA capture sequencing enhances the detection rate of pathognomonic fusions and enables the identification of novel and secondary fusion transcripts in sarcomas.
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25
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Nakaguro M, Sadow PM, Hu R, Hattori H, Kuwabara K, Tsuzuki T, Urano M, Nagao T, Faquin WC. NKX3.1 Expression in Salivary Gland "Intraductal" Papillary Mucinous Neoplasm: A Low-Grade Subtype of Salivary Gland Mucinous Adenocarcinoma. Head Neck Pathol 2022; 16:1114-1123. [PMID: 35834096 PMCID: PMC9729659 DOI: 10.1007/s12105-022-01471-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 06/20/2022] [Indexed: 01/11/2023]
Abstract
BACKGROUND Salivary gland intraductal papillary mucinous neoplasm (SG IPMN) is a recently proposed entity characterized by a papillary-cystic proliferation of mucin-producing cells. Because of overlapping histologic features and a clonal AKT1 p.E17K variant, SG IPMN has been presumed to be a precursor or a low-grade subtype of mucinous adenocarcinoma. NKX3.1 is a tumor suppressor gene located on chromosome 8p and is a known immunohistochemical marker of prostate epithelium and mucinous acinar cells of the intraoral salivary glands. METHODS We retrieved 12 SG IPMN cases, and performed histologic and genetic analysis. Given the association of SG IPMN with mucinous acinar cells, we also investigated the performance of NKX3.1 as a marker of this tumor entity. RESULTS Diffuse and strong NKX3.1 expression was observed in all SG IPMN cases (12/12, 100%) as well as in normal mucinous acinar cells. In contrast, mucoepidermoid carcinoma and pancreatic IPMN cases as well as normal serous acinar cells were negative for NKX3.1. Genetically, 11 of 12 cases (92%) harbored an AKT1 p.E17K variant. A novel PTEN frameshift deletion (p.G36Dfs*18) was detected in the other single case. At least one of the histologic features implying malignant tumors, such as severe cellular atypia, brisk mitotic activity, high Ki-67 proliferating index, lymphovascular invasion, and lymph node metastasis, was detected in 6 SG IPMN cases (50%). CONCLUSION The findings suggest that SG IPMN is a low-grade subtype of mucinous adenocarcinoma which may be derived from mucinous acinar cells of the minor salivary gland.
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Affiliation(s)
- Masato Nakaguro
- grid.38142.3c000000041936754XDepartment of Pathology, Massachusetts General Hospital Harvard Medical School, Boston, MA USA ,grid.437848.40000 0004 0569 8970Department of Pathology and Laboratory Medicine, Nagoya University Hospital, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi 466-8560 Japan
| | - Peter M. Sadow
- grid.38142.3c000000041936754XDepartment of Pathology, Massachusetts General Hospital Harvard Medical School, Boston, MA USA
| | - Rong Hu
- grid.14003.360000 0001 2167 3675Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI USA
| | - Hikaru Hattori
- grid.437848.40000 0004 0569 8970Department of Medical Genomics Center, Nagoya University Hospital, Nagoya, Japan
| | - Kyoko Kuwabara
- grid.415442.20000 0004 1763 8254Department of Pathology and Clinical Laboratories, Komaki City Hospital, Komaki, Japan
| | - Toyonori Tsuzuki
- grid.411234.10000 0001 0727 1557Department of Surgical Pathology, Aichi Medical University, Nagakute, Japan
| | - Makoto Urano
- grid.256115.40000 0004 1761 798XDepartment of Diagnostic Pathology, Bantane Hospital, Fujita Health University, Nagoya, Japan
| | - Toshitaka Nagao
- grid.410793.80000 0001 0663 3325Department of Anatomic Pathology, Tokyo Medical University, Tokyo, Japan
| | - William C. Faquin
- grid.38142.3c000000041936754XDepartment of Pathology, Massachusetts General Hospital Harvard Medical School, Boston, MA USA
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Shastri M, Gupta N, Dey P, Srinivasan R, Radotra BD. Cytomorphological Spectrum of Solitary Fibrous Tumor: Revisited. Cytopathology 2022; 33:688-695. [PMID: 35778919 DOI: 10.1111/cyt.13163] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/09/2022] [Accepted: 06/28/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Solitary fibrous tumor (SFT) is a tumor of mesenchymal origin. Its diagnosis on cytology is challenging, owing to variation in cellularity, sparsely distributed cellular and stromal components and inapparent vasculature. The cytomorphologic findings have been rarely described in literature with a few case reports and occasional case series. We present the cytomorphologic features of SFT with special emphasis on immunochemical findings. MATERIALS AND METHODS We present cytological data from eight cases of histopathologically proven SFTs. The cytomorphologic features, immunochemical markers and differential diagnostic entities on fine needle aspiration cytology (FNAC) arediscussed. RESULTS FNA was performed at different anatomical sites. Cytology smears showed variable cellularity with tumor cells arranged in loose clusters and as singly scattered cells. Interlacing fascicles with palisading of cells was noted. The cells were predominantly spindle to elongated, having moderate cytoplasm with elongated wavy nuclei. These nuclei had fine to coarse chromatin, with inconspicuous to prominent nucleoli. There was prominent metachromatically staining, amorphous to fibrillary, collagenous to myxoid matrix materialassociated with tumor cells. Other findings included intranuclear pseudo-inclusions, multinucleated giant cells and atypical mitoses. Cytological diagnosis offered varied from 'spindle cell neoplasm' to 'spindle cell sarcoma' or 'suggestive of sarcoma'.Immunocytochemistry (ICC) done on cell block sections showed positivity for STAT6, CD34 and Bcl-2. CONCLUSION Cytological diagnosis of SFT can be challenging. A prudent search for characteristic cytomorphological features is of diagnostic help. The cytomorphology should be interpreted with caution with appropriate ICC panel including STAT6 and CD34.
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Affiliation(s)
- Malvika Shastri
- Department of Cytology and Gynaecological Pathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Nalini Gupta
- Department of Cytology and Gynaecological Pathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Pranab Dey
- Department of Cytology and Gynaecological Pathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Radhika Srinivasan
- Department of Cytology and Gynaecological Pathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Bishan Dass Radotra
- Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
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27
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Does PAX7 and NKX2.2 immunoreactivity in Ewing sarcoma have prognostic significance? Virchows Arch 2022; 480:909-917. [PMID: 34985580 DOI: 10.1007/s00428-021-03254-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/12/2021] [Accepted: 12/14/2021] [Indexed: 01/17/2023]
Abstract
Ewing sarcoma (ES) is an aggressive neoplasm with variable morphology. It has no specific immunoprofile or molecular signature. Neither CD99, NKX2.2 nor PAX7 immunoreactivity alone is completely specific, although diagnostic specificity improves when combined. The purpose of the present study was to investigate the immunohistochemical (IHC) expression of PAX7 in a large series of genetically confirmed ES. Existing results for CD99 and NKX2.2 immunoexpression, morphological findings and molecular studies (fusion gene subtypes) were retrieved from a previous study. Survival analyses were performed in cases with available clinical follow-up. PAX7 was positive in 95.5% of ES with diffuse staining (> 50%) in all positive cases and moderate or strong intensity for most cases. Nineteen ES displayed both PAX7 and CD99 immunoreactivity but lacked NKX2.2 immunoexpression. No relationships could be found between PAX7 expression and the histological types or ES gene fusion subtypes. Univariant/multivariate analysis showed that lack of PAX7 and/or NKX2.2 immunoexpression constitute independent poor prognostic factors for progression free survival (PFS) and overall survival (OS). In conclusion, IHC for CD99, NKX2.2, and PAX7 may be useful in daily practice for ES diagnosis, particularly in hospitals lacking facilities for molecular studies. In addition, the combination of strong CD99 membranous positivity and nuclear PAX7 and NKX2.2 immunoreactivity seems to be very reliable for ES diagnosis when supported by a corroborating histomorphologic and clinical picture. Although PAX7 is not entirely specific for ES, it seems to have a more extensive and strong nuclear immunoreactivity than NKX2.2 expression, even in tumors with decalcification artifact. Considering the prognostically significant data herein reported, we strongly recommend validation in prospective ES series that include localized and disseminated tumors.
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Haefliger S, Andrei V, Baumhoer D. Update of Key Clinical, Histological and Molecular Features of Malignant Bone Tumours Arising in the Craniofacial Skeleton. Front Oncol 2022; 12:954717. [PMID: 35875137 PMCID: PMC9301068 DOI: 10.3389/fonc.2022.954717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 06/15/2022] [Indexed: 02/05/2023] Open
Abstract
The craniofacial skeleton is a highly complex and specialized anatomic region containing and protecting the brain and sensory organs. Bone sarcomas arising here comprise a heterogeneous group of tumours, some of which differ in their biological behaviour compared to their peripheral counterparts. The reasons for this seem to lie, at least partially, in the embryonal development of the craniofacial bones. For reaching the correct diagnosis as the cornerstone of optimal personalised treatment planning, a multidisciplinary team of specialists, including pathologists, radiologists, oncologists, and head and neck surgeons needs to be involved. The most common tumours arising in the craniofacial bones are bone-forming tumours, cartilage-forming tumours, fibro-osseous lesions, giant cell-rich lesions, and notochordal tumours. While morphology remains the backbone for the diagnosis, the last decade has witnessed tremendous advances in the molecular characterization of tumours, and molecular testing is increasingly becoming a part of the diagnostic process. The integration of these new molecular markers into the diagnostic approach has undoubtedly increased the diagnostic accuracy and objectivity, and holds great promise to also identify new therapeutic targets for precision medicine in the future. Examples include HEY1-NCOA2 in mesenchymal chondrosarcoma, IDH1/2 mutations in chondrosarcoma and TFCP2 rearrangements in rhabdomyosarcoma. In this article, key clinical, histological and molecular features of malignant bone tumours arising in the craniofacial region are discussed, with a special focus on the differential diagnosis and prognostic considerations.
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Black MA, Charville GW. Diagnosis of soft tissue tumors using immunohistochemistry as a surrogate for recurrent fusion oncoproteins. Semin Diagn Pathol 2022; 39:38-47. [PMID: 34750023 PMCID: PMC8688262 DOI: 10.1053/j.semdp.2021.10.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 10/28/2021] [Indexed: 01/03/2023]
Abstract
Soft tissue neoplasms encompass a broad spectrum of clinicopathologic manifestations. In a subset of soft tissue tumors, spanning a wide range of clinical behavior from indolent to highly aggressive, recurrent genetic translocations yield oncogenic fusion proteins that drive neoplastic growth. Beyond functioning as primary mechanisms of tumorigenesis, recurrent translocations represent key diagnostic features insofar as the presence of a particular oncogenic gene fusion generally points to specific tumor entities. In addition to more direct methods for identifying recurrent translocations, such as conventional cytogenetics or fluorescence in situ hybridization, immunohistochemistry for a component of the fusion oncoprotein increasingly is being used as a surrogate marker, exploiting the tendency of these fusion components to be distinctively overexpressed by translocation-bearing tumor cells. Diagnostic immunohistochemistry can also be used to identify the characteristic gene expression changes that occur downstream of oncogenic fusions. Here, we review the use of immunohistochemistry to detect surrogate markers of recurrent translocations in soft tissue tumors, focusing on the practical applications and limitations of this diagnostic approach.
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Affiliation(s)
- Margaret A. Black
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
| | - Gregory W. Charville
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA,Correspondence to: Gregory W. Charville, MD, PhD, Department of Pathology, Stanford University School of Medicine, 300 Pasteur Drive, Lane 235, Stanford, CA 94305-5324 (, tel: 650-723-8310)
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30
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Le Loarer F, Baud J, Azmani R, Michot A, Karanian M, Pissaloux D. Advances in the classification of round cell sarcomas. Histopathology 2021; 80:33-53. [PMID: 34958508 DOI: 10.1111/his.14547] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/17/2021] [Accepted: 08/17/2021] [Indexed: 12/25/2022]
Abstract
Round cell sarcomas represent a diagnostic challenge for pathologists, owing to the poorly differentiated features of these high-grade tumours. The diagnosis of round cell sarcoma requires large immunohistochemical panels and molecular testing in many cases. This spectrum of malignancies is largely dominated by Ewing sarcomas (ESs), which represent the most common family of these tumours. Nonetheless, new families have been delineated in the past few years, with the addition of two additional families in the 2020 World Health Organization classification of bone and soft tissue tumours, namely sarcomas with CIC rearrangements and sarcomas with BCOR alterations. EWSR1, one of the genes involved in the driver fusion of ESs, is also implicated in the translocation of many other tumours with heterogeneous lineages and variable levels of aggressiveness. Round cell sarcomas associated with fusions inwhichEWSR1is partnered with genes encoding transcription factors distinct from those of the 'Ewing family' represent a heterogeneous group of rare tumours that require further study to determine whether their fusions may or not define a specific subgroup. They include mainly sarcomas with NFATc2 rearrangements and sarcomas with PATZ1 rearrangements. At this point, PATZ1 fusions seem to be associated with tumours of high clinical and morphological heterogeneity. Molecular studies have also helped in the identification of more consistent biomarkers that give tremendous help to pathologists in triaging, if not diagnosing, these tumours in practice. This review compiles the latest accumulated evidence regarding round cell sarcomas, and discusses the areas that are still under investigation.
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Affiliation(s)
- Francois Le Loarer
- Université de Bordeaux, Talence, France.,Département de Biopathologie, Bordeaux, France.,INSERM U1218, ACTION, Bordeaux, France
| | - Jessica Baud
- Université de Bordeaux, Talence, France.,INSERM U1218, ACTION, Bordeaux, France
| | | | - Audrey Michot
- Université de Bordeaux, Talence, France.,INSERM U1218, ACTION, Bordeaux, France.,Department of Surgery, Institut Bergonie, Bordeaux, France
| | - Marie Karanian
- Département de Biopathologie, Centre Leon Berard, Lyon, France.,INSERM U1052, Cancer Research Centre of Lyon, Lyon, France
| | - Daniel Pissaloux
- Département de Biopathologie, Centre Leon Berard, Lyon, France.,INSERM U1052, Cancer Research Centre of Lyon, Lyon, France
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31
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Ong SL, Lam SW, van den Akker BE, Kroon HM, Briaire-de Bruijn IH, Cleven AH, Savci-Heijink DC, Cleton-Jansen AM, Baumhoer D, Szuhai K, Bovée JV. Expanding the Spectrum of EWSR1-NFATC2-rearranged Benign Tumors: A Common Genomic Abnormality in Vascular Malformation/Hemangioma and Simple Bone Cyst. Am J Surg Pathol 2021; 45:1669-1681. [PMID: 34081036 PMCID: PMC8598111 DOI: 10.1097/pas.0000000000001748] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A simple bone cyst (SBC) is a cystic bone lesion predominantly affecting young males. The cyst is lined by a fibrous membrane and filled with serosanguinous fluid. EWSR1/FUS-NFATC2 rearrangements were recently identified in SBC. We here report exactly the same rearrangement in 3 lesions diagnosed as vascular malformations of 2 elderly patients. In total, through Archer FusionPlex, fluorescence in situ hybridization and/or reverse transcriptase-polymerase chain reaction the EWSR1-NFATC2 rearrangement was identified in 6 of 9 SBC, 3 of 12 benign vascular tumors, and none of 5 aneurysmal bone cyst lacking USP6 fusion. Using fluorescence in situ hybridization, it was apparent that amplification of the fusion, as seen in EWSR1-NFATC2 round cell sarcomas, was absent, and that in the vascular tumors the fusion was present both in the lining cells as well as in the surrounding spindle cells. Of note, not all of the spaces in the vascular malformations were lined by endothelial cells. Aggrecan was positive in all cases but was not specific. NKX2-2 and NKX3-1 staining were negative in all cases. Thus, even though the overlap between the 2 entities is limited to the presence of few thick-walled cysts lacking endothelial lining in the benign vascular malformations, the spectrum of benign tumors containing NFATC2 fusions should be expanded and contains not only SBC in the young, but also vascular malformation/hemangioma in elderly patients.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Daniel Baumhoer
- Department of Medical Genetics and Pathology, Bone Tumor Reference Center, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Karoly Szuhai
- Cell and Chemical Biology, Leiden University Medical Center, Leiden
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32
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Hameed M. Malignant Cartilage-Forming Tumors. Surg Pathol Clin 2021; 14:605-617. [PMID: 34742483 DOI: 10.1016/j.path.2021.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Chondrosarcomas are heterogeneous matrix-producing cartilaginous neoplasms with variable clinical behavior. Subtypes include conventional (75%), dedifferentiated (10%), clear cell (2%), mesenchymal (2%), and periosteal chondrosarcoma (<1%). Tumor location and primary vs secondary also play a role. In conventional chondrosarcoma, histologic grading (I, II, and III) remains the gold standard for predicting recurrence and metastases. Due to the locally aggressive but overall nonmetastatic behavior, grade I chondrosarcomas (primary and secondary) of long and short tubular bones have been reclassified as atypical cartilaginous tumor. In this review, the pathologic features of malignant cartilage tumors are discussed with updates on recent genetic findings.
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Affiliation(s)
- Meera Hameed
- Department of Pathology, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA.
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33
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Abstract
Undifferentiated small round cell sarcomas represent a heterogeneous group of mesenchymal neoplasms. While imprecise, this term nevertheless provides a useful framework for conceptualizing these tumors. This article highlights current trends in their classification based on morphology, immunohistochemistry, and advanced molecular techniques. As next-generation sequencing becomes commonplace in diagnostic laboratories pathologists can expect to differentiate these tumors with increasing confidence, and actively contribute to related discoveries. Ultimately, when synthesized with rigorous clinical outcome data and other investigative techniques, a more robust landscape for the molecular diagnosis and classification of undifferentiated small round cell sarcomas is expected to emerge in the future.
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Cordier F, Van der Meulen J, Van Gaever B, Lapeire L, Sys G, Van Dorpe J, Creytens D. Undifferentiated sarcoma of bone with a round to epithelioid cell phenotype harboring a novel EWSR1-SSX2 fusion identified by RNA-based next-generation sequencing. Genes Chromosomes Cancer 2021; 61:44-49. [PMID: 34538011 DOI: 10.1002/gcc.22999] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 08/31/2021] [Accepted: 09/14/2021] [Indexed: 11/09/2022] Open
Abstract
Due to the increased application of RNA-based next-generation sequencing techniques on bone and soft tissue round cell sarcomas new fusions are frequently found, thereby expanding the molecular landscape of these tumors. In this report, we describe and discuss the finding of an undifferentiated sarcoma of the bone with a round to epithelioid cell phenotype harboring a novel EWSR1-SSX2 fusion. Treatment of this new bone tumor entity according to the Euro Ewing 2012 protocol led to complete pathologic response.
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Affiliation(s)
- Fleur Cordier
- Department of Pathology, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Joni Van der Meulen
- Molecular Diagnostics Ghent University Hospital (MDG), Ghent University Hospital, Ghent University, Ghent, Belgium.,CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Bram Van Gaever
- Department of Pathology, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Lore Lapeire
- CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium.,Department of Medical Oncology, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Gwen Sys
- CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium.,Department of Traumatology and Orthopaedics, 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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Makise N, Yoshida KI, Iijima T, Yoshida A, Ushiku T, Ishida T. Skeletal EWSR1-NFATC2 sarcoma previously diagnosed as Ewing-like adamantinoma: A case report and literature review emphasizing its unique radiological features. Pathol Int 2021; 71:614-620. [PMID: 34192825 DOI: 10.1111/pin.13135] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 06/01/2021] [Indexed: 11/30/2022]
Abstract
Ewing-like adamantinoma (EAD) is a rare bone tumor. It remains unclear whether EAD belongs to adamantinoma, Ewing sarcoma (ES), or an independent category. Herein, we present a case of femoral sarcoma previously diagnosed as EAD in a 26-year-old woman. We observed amplified EWSR1 and NFATC2 fusion signals using fluorescence in situ hybridization. Prompted by its unique radiological features, we reviewed the current literature on skeletal EWSR1-NFATC2 sarcoma (ENS) and EAD. In addition to the similar histological features, we found that both ENS and EAD displayed similar characteristic radiological features, such as the tendency to occur in the diaphysis of long bones, cortical expansion and buttressing-type thickening, and bone surface involvement with saucer-like erosion without cortical destruction. We believe that these unique radiological features were related to its indolent behavior. Altogether, it is possible that previously reported EAD cases may be neither ES nor the classic adamantinoma but ENS. Further studies are needed to clarify the relationship between EAD and ENS.
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Affiliation(s)
- Naohiro Makise
- Department of Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Ken-Ichi Yoshida
- Department of Pathology, Nihon University School of Medicine, Tokyo, Japan
| | - Takuo Iijima
- Orthopedic Division, Japan Community Health Care Organization Tokyo Yamate Medical Center, Tokyo, Japan
| | - Akihiko Yoshida
- Department of Diagnostic Pathology, National Cancer Center Hospital, Tokyo, Japan.,Rare Cancer Center, National Cancer Center Hospital, Tokyo, Japan
| | - Tetsuo Ushiku
- Department of Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tsuyoshi Ishida
- Department of Diagnostic Pathology, National Hospital Organization Saitama Hospital, Saitama, Japan
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Diagnostic Immunohistochemistry of Soft Tissue and Bone Tumors: An Update on Biomarkers That Correlate with Molecular Alterations. Diagnostics (Basel) 2021; 11:diagnostics11040690. [PMID: 33921435 PMCID: PMC8069362 DOI: 10.3390/diagnostics11040690] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 03/31/2021] [Accepted: 04/01/2021] [Indexed: 02/06/2023] Open
Abstract
The diagnosis of benign and malignant soft tissue and bone neoplasms is a challenging area of surgical pathology, due to the large number, rarity, and histologic diversity of tumor types. In recent years, diagnosis and classification has been aided substantially by our growing understanding of recurrent molecular alterations in these neoplasms. Concurrently, the role of diagnostic immunohistochemistry has also expanded, with the development of numerous biomarkers based on underlying molecular events. Such biomarkers allow us to infer the presence of these events and can therefore substitute for other ancillary molecular genetic techniques (e.g., fluorescence in situ hybridization, polymerase chain reaction, and next-generation sequencing). In this review, we discuss a range of biomarkers currently available for these neoplasms, highlighting the accuracy, staining characteristics, and interpretation pitfalls of each antibody. These include immunohistochemical antibodies that represent reliable surrogates for the detection of gene fusions (e.g., STAT6, CAMTA1, FOSB, DDIT3) and more recently described breakpoint-specific antibodies (e.g., SS18-SSX, PAX3/7-FOXO1). Additionally, discussed are markers that correlate with the presence of gene amplifications (e.g., MDM2, CDK4), deletions (e.g., SMARCB1, SMARCA4), single nucleotide variants (e.g., G34W, K36M), aberrant methylation (H3K27me3), and increased expression as discovered through gene expression profiling (e.g., MUC4, DOG1, ETV4, NKX2.2, NKX3.1).
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Yoshida A, Hashimoto T, Ryo E, Yoshida KI, Motoi T, Yatabe Y, Mori T. Confirmation of NKX3-1 Expression in EWSR1-NFATC2 Sarcoma and Mesenchymal Chondrosarcoma Using Monoclonal Antibody Immunohistochemistry, RT-PCR, and RNA In Situ Hybridization. Am J Surg Pathol 2021; 45:578-582. [PMID: 33443863 DOI: 10.1097/pas.0000000000001627] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Akihiko Yoshida
- Department of Diagnostic Pathology National Cancer Center Hospital
| | - Taiki Hashimoto
- Department of Diagnostic Pathology National Cancer Center Hospital
| | - Eijitsu Ryo
- Division of Molecular Pathology National Cancer Center Research Institute
| | | | - Toru Motoi
- Department of Pathology Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital Tokyo, Japan
| | - Yasushi Yatabe
- Department of Diagnostic Pathology National Cancer Center Hospital
- Division of Molecular Pathology National Cancer Center Research Institute
| | - Taisuke Mori
- Department of Diagnostic Pathology National Cancer Center Hospital
- Division of Molecular Pathology National Cancer Center Research Institute
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38
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Hung YP, Fisch AS, Diaz-Perez JA, Iafrate AJ, Lennerz JK, Nardi V, Bredella MA, Raskin KA, Lozano-Calderon SA, Rosenberg AE, Nielsen GP. Identification of EWSR1-NFATC2 fusion in simple bone cysts. Histopathology 2021; 78:849-856. [PMID: 33316098 DOI: 10.1111/his.14314] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/09/2020] [Accepted: 12/10/2020] [Indexed: 12/12/2022]
Abstract
AIMS Simple bone cysts are benign intramedullary tumours primarily involving the long bones in skeletally immature individuals. Several mechanisms have been proposed for their pathogenesis. Although the diagnosis is typically straightforward, the interpretation can be problematic, because of superimposed fracture causing them to resemble aneurysmal bone cysts and other tumours. EWSR1-NFATC2 or FUS-NFATC2 fusions, which are characteristic of a subset of aggressive round cell sarcomas, have been recently detected in simple bone cysts. The aim of this study was to examine the clinicopathological and molecular features in a series of simple bone cysts. METHODS AND RESULTS Using RNA-based next-generation sequencing and/or fluorescence in-situ hybridisation, we investigated the presence of EWSR1 or FUS rearrangements in nine simple bone cysts. The patients were five females and four males, aged 3-23 years (median, 14 years); the tumours ranged from 19 mm to 160 mm (median, 46 mm) in size, and involved the femur (n = 3), humerus (n = 2), fibula (n = 2), tibia (n = 1), and iliac wing (n =1). We identified three cases with EWSR1-NFATC2 fusion (showing identical breakpoints to those in EWSR1-NFATC2 sarcomas) and one additional case with FUS rearrangement. Unlike in EWSR1-NFATC2 sarcomas, immunohistochemical expression of NKX3.1 and NKX2.2 was absent in two simple bone cysts tested. CONCLUSIONS More than 40% of simple bone cysts harbour genetic alterations confirming that they are neoplastic, investigation of EWSR1 and/or FUS rearrangement may help to distinguish simple bone cysts from mimics, and NFATC2 rearrangement is not pathognomonic of malignancy.
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Affiliation(s)
- Yin P Hung
- Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Adam S Fisch
- Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Julio A Diaz-Perez
- Department of Pathology and Laboratory Medicine, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - A John Iafrate
- Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Jochen K Lennerz
- Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Valentina Nardi
- Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Miriam A Bredella
- Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Kevin A Raskin
- Department of Orthopedics, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | | | - Andrew E Rosenberg
- Department of Pathology and Laboratory Medicine, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - G Petur Nielsen
- Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
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39
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Ramanayake N, Vargas AC, Talbot J, Bonar F, Wong DD, Wong D, Mahar A, Karim R, Luk PP, Selinger C, Sioson L, Gill AJ, Maclean F. NKX3.1 immunohistochemistry is highly specific for the diagnosis of mesenchymal chondrosarcomas: experience in the Australian population. Pathology 2021; 53:705-712. [PMID: 33640159 DOI: 10.1016/j.pathol.2020.11.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 11/20/2020] [Accepted: 11/28/2020] [Indexed: 10/22/2022]
Abstract
Mesenchymal chondrosarcoma (MC) is a rare sarcoma that typically arises in adolescents and young adults and characteristically harbours a HEY1-NCOA2 gene fusion. A recent study has shown that NKX3.1 immunohistochemistry (IHC) is highly specific and sensitive in MCs. NKX3.1 is a nuclear marker expressed in prostatic tissue and is widely used in most laboratories to determine prostatic origin of metastatic tumours. In the current study we investigated whether this stain can be used in the diagnostic workup of MC, as it may assist in triaging cases for further molecular testing, by assessing its expression in a cohort of MCs and in a wide spectrum of sarcoma types. Furthermore, we aimed to elucidate if expression of NKX3.1 by MCs is related to androgen receptor (AR) expression. We identified NKX3.1 positive nuclear staining in 9 of 12 individual patients of MC (n=20 of 25 samples when taking into account separate episodes). Four of the five negative specimens had been previously subjected to acid-based decalcification. NKX3.1 was negative in 536 samples from 16 non-MC sarcomas derived from largely tissue microarrays (TMAs). Overall, we identified 80% sensitivity and 100% specificity for NKX3.1 IHC in MCs. The sensitivity increased to 95.2% when acid-based decalcified specimens were excluded from the analysis. No correlation between NKX3.1 expression and AR IHC was identified. In summary, our findings indicate that NKX3.1 nuclear positivity is highly sensitive and specific for MC, provided that ethylenediaminetetraacetic acid (EDTA)-based rather than acid-based decalcification is used for sample processing. NKX3.1 IHC in the right clinical and histopathological setting can potentially be sufficient for the diagnosis of MC, reserving molecular confirmation only for equivocal cases.
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Affiliation(s)
- Nimeka Ramanayake
- Department of Anatomical Pathology, Douglass Hanly Moir Pathology, Macquarie Park, NSW, Australia.
| | - Ana Cristina Vargas
- Department of Anatomical Pathology, Douglass Hanly Moir Pathology, Macquarie Park, NSW, Australia; Cancer Diagnosis and Pathology Group, Kolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, NSW, Australia; University of Sydney, Sydney, NSW, Australia
| | - Joel Talbot
- Department of Anatomical Pathology, Douglass Hanly Moir Pathology, Macquarie Park, NSW, Australia
| | - Fiona Bonar
- Department of Anatomical Pathology, Douglass Hanly Moir Pathology, Macquarie Park, NSW, Australia
| | - Daniel D Wong
- Anatomical Pathology, PathWest, QEII Medical Centre, Nedlands, WA, Australia; School of Medicine, The University of Western Australia, Crawley, WA, Australia
| | - David Wong
- Mater Health Services, Duncombe Building, South Brisbane, Qld, Australia
| | - Annabelle Mahar
- Department of Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Rooshdiya Karim
- Department of Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Peter P Luk
- Department of Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, Sydney, NSW, Australia
| | - Christina Selinger
- Royal College of Pathologists of Australasia, Surry Hills, NSW, Australia
| | - Loretta Sioson
- Cancer Diagnosis and Pathology Group, Kolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, NSW, Australia
| | - Anthony J Gill
- Cancer Diagnosis and Pathology Group, Kolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, NSW, Australia; University of Sydney, Sydney, NSW, Australia; NSW Health Pathology, Department of Anatomical Pathology, Royal North Shore Hospital, St Leonards, NSW, Australia
| | - Fiona Maclean
- Department of Anatomical Pathology, Douglass Hanly Moir Pathology, Macquarie Park, NSW, Australia; Cancer Diagnosis and Pathology Group, Kolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, NSW, Australia; Faculty of Medicine and Health Sciences, Macquarie University, North Ryde, NSW, Australia
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40
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Syed M, Mushtaq S, Loya A, Hassan U. NKX3.1 a useful marker for mesenchymal chondrosarcoma: An immunohistochemical study. Ann Diagn Pathol 2020; 50:151660. [PMID: 33302222 DOI: 10.1016/j.anndiagpath.2020.151660] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 11/02/2020] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Mesenchymal chondrosarcoma is a rare subtype of chondrosarcoma. The tumor has a characteristic bimorphic pattern with areas of poorly differentiated small round cell component and interspersed islands of well differentiated hyaline cartilage. Histological diagnosis of mesenchymal chondrosarcoma is very challenging especially in small biopsies when tumor presents with little cartilaginous component. In such cases, it is very difficult to distinguish mesenchymal chondrosarcoma from other round blue cell tumors like Ewing's sarcoma, rhabdomyosarcoma, small cell osteosarcoma and desmoplastic round blue cell tumor. Immunohistochemically, mesenchymal chondrosarcoma stains positive for NKX2.2, CD99, S100 and SOX9. This immunoprofile is non-specific and overlaps with other round blue cell tumors. Till recently, there was no reliable immunohistochemical marker to differentiate mesenchymal chondrosarcoma from other round blue cell tumors. NKX3.1, though widely used as a diagnostic biomarker for prostatic adenocarcinoma, has been recently proposed by Yoshida et al. (2020) as a unique marker of mesenchymal chondrosarcoma and EWSR1-NFATC2 sarcoma. OBJECTIVE The aim of our study was to further explore utility of NKX3.1 as a diagnostic marker of mesenchymal chondrosarcoma. MATERIAL & METHODS We applied NKX3.1 immunohistochemistry to 21 cases of mesenchymal chondrosarcoma and 32 cases of other round blue cell tumors. RESULTS 14 out of 21 cases (66.7%) of mesenchymal chondrosarcoma stained positive for NKX3.1 with nuclear expression in small round component. Cartilaginous component was predominantly negative. All other round blue cell tumors showed negative results. CONCLUSION Based on our study results we suggest that NKX3.1 is a useful immunohistochemical marker in differentiating mesenchymal chondrosarcoma from its histological mimics.
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Affiliation(s)
- Madiha Syed
- Department of Histopathology, Shaukat Khanum Memorial Cancer Hospital and Research Center, Lahore, Pakistan.
| | - Sajid Mushtaq
- Department of Histopathology, Shaukat Khanum Memorial Cancer Hospital and Research Center, Lahore, Pakistan
| | - Asif Loya
- Department of Histopathology, Shaukat Khanum Memorial Cancer Hospital and Research Center, Lahore, Pakistan
| | - Usman Hassan
- Department of Histopathology, Shaukat Khanum Memorial Cancer Hospital and Research Center, Lahore, Pakistan
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41
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Chen W, Hornick JL, Fletcher CDM. NKX3.1 immunoreactivity is not identified in mesenchymal chondrosarcoma: a 25-case cohort study. Histopathology 2020; 78:334-337. [PMID: 32779239 DOI: 10.1111/his.14231] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/04/2020] [Accepted: 08/06/2020] [Indexed: 12/01/2022]
Abstract
AIMS Mesenchymal chondrosarcoma (MC) is characterised typically by a bimorphic microscopic appearance of islands of a well-differentiated cartilaginous component, admixed with a primitive small cell component, which commonly expresses CD99 and NKX2.2. Given the variable relative abundance of each component and histological overlap with other small round cell tumours, the diagnosis can be challenging, especially in a limited sample. A distinctive gene fusion between HEY1 (located in 8q21) and NCOA2 (located in 8q13) was identified in MC, but the downstream molecular events are unknown. NKX3.1 (coding gene located in 8p21.1) was recently reported to be expressed in a small number of MC cases. The purpose of this study was to evaluate the potential diagnostic utility of NKX3.1 immunohistochemistry in MC. METHODS AND RESULTS We evaluated sections from 25 cases of MC, including 20 extraskeletal and five osseous. The tumour affected nine females and 16 males, with a median age of 34 years (age range = 7-82 years). Two different rabbit antibodies against NKX3.1 (monoclonal and polyclonal) were used for immunohistochemistry. However, no immunoreactivity was observed with either of the antibodies in all 25 (100%) MC. CONCLUSIONS NKX3.1 immunoreactivity was not identified in our cohort. Clonality of the antibody could not explain the negativity.
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Affiliation(s)
- Wei Chen
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Jason L Hornick
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Christopher D M Fletcher
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
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Pitra T, Pivovarcikova K, Alaghehbandan R, Compérat EM, Hora M, Rogala J, Slisarenko M, Michal M, Hes O. Utility of NKX3.1 immunohistochemistry in the differential diagnosis of seminal vesicles versus prostatic tissue in needle biopsy. Ann Diagn Pathol 2020; 49:151644. [PMID: 33126153 DOI: 10.1016/j.anndiagpath.2020.151644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 10/09/2020] [Indexed: 11/28/2022]
Abstract
NKX3.1 is considered a reliable immunohistochemical marker of prostatic origin with high specificity and sensitivity. However, NKX3.1 positivity has been described in other neoplastic and non-neoplastic tissues, such as mesenchymal chondrosarcoma, sex-cord stromal tumors, rete testis adenocarcinoma, lobular and ductal carcinoma of the breast, salivary glands, peribronchial submucosal glands, and Sertoli cells. We analyzed expression of two antibodies (mono and polyclonal) of NKX3.1 in a total of 63 non-neoplastic seminal vesicles. We used 52 resection materials (12 seminal vesicles without prostatic adenocarcinoma, 26 seminal vesicles with prostatic adenocarcinoma infiltration, and 14 cases of seminal vesicles infiltrated by urothelial carcinoma) and 11 prostatic core needle biopsies with incidentally sampled fragment of seminal vesicles. In all cases, tissues from seminal vesicles were completely negative for NKX3.1, despite using polyclonal and monoclonal NKX3.1 antibodies, and regardless of the detection system utilized (diaminobenzidine (DAB) versus alkaline phosphatase (AF)). However, prostatic adenocarcinoma was negative in several cases (n = 6), when AF detection system was used. Reaction with DAB was strong and robust in all cases. Based on our data, we can recommend NKX3.1 as a negative immunohistochemical marker of seminal vesicles.
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Affiliation(s)
- Tomas Pitra
- Department of Urology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic
| | - Kristyna Pivovarcikova
- Department of Pathology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic
| | - Reza Alaghehbandan
- Department of Pathology, Faculty of Medicine, University of British Columbia, Royal Columbian Hospital, Vancouver, BC, Canada
| | - Eva Maria Compérat
- Department of Pathology, Tenon Hospital, Sorbonne University, France; Department of Pathology, Medical University Vienna, Austria
| | - Milan Hora
- Department of Urology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic
| | - Joanna Rogala
- Department of Pathology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic
| | - Maryna Slisarenko
- Department of Pathology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic
| | - Michal Michal
- Department of Pathology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic
| | - Ondrej Hes
- Department of Pathology, Charles University in Prague, Faculty of Medicine in Plzeň, Pilsen, Czech Republic.
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43
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Stewart CJR, Moses J. NKX3.1 expression in cervical 'adenoid basal cell carcinoma': another gynaecological lesion with prostatic differentiation? Pathology 2020; 53:193-198. [PMID: 33032811 DOI: 10.1016/j.pathol.2020.07.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/07/2020] [Accepted: 07/20/2020] [Indexed: 10/23/2022]
Abstract
Adenoid basal cell carcinoma (ABC) is considered a rare cervical neoplasm which when present in 'pure' form, uniquely amongst apparently malignant cervical tumours, has never been reported to metastasise or lead to fatal patient outcome. We recently encountered a case of ABC that was morphologically reminiscent of prostatic differentiation, more specifically basal cell hyperplasia of the prostate. Immunohistochemistry was strongly positive for the prostate related marker NKX3.1 in the glandular cells, but there was no expression of prostate specific antigen (PSA) or prostatic acid phosphatase (PAP). However, subsequent review of five additional cervical ABCs demonstrated focal PAP expression in two of four tested cases, and all were NKX3.1 positive. NKX3.1 expression was also demonstrated in the glandular epithelium of 10 additional gynaecological lesions considered to show prostatic differentiation including five cases of cervical ectopic prostatic tissue, three ovarian teratomas with prostatic differentiation, and two vaginal tubulosquamous polyps. We suggest that some lesions traditionally classified as ABC may in fact represent a variant of prostatic differentiation within the cervix, possibly analogous to basal cell hyperplasia of the prostate.
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Affiliation(s)
- Colin J R Stewart
- Department of Pathology, King Edward Memorial Hospital, Perth, WA, Australia; School of Women's and Infants' Health, University of Western Australia, WA, Australia.
| | - Joanne Moses
- LabPlus, Auckland City Hospital, Auckland, New Zealand
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44
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Perret R, Escuriol J, Velasco V, Mayeur L, Soubeyran I, Delfour C, Aubert S, Polivka M, Karanian M, Meurgey A, Le Guellec S, Weingertner N, Hoeller S, Coindre JM, Larousserie F, Pierron G, Tirode F, Le Loarer F. NFATc2-rearranged sarcomas: clinicopathologic, molecular, and cytogenetic study of 7 cases with evidence of AGGRECAN as a novel diagnostic marker. Mod Pathol 2020; 33:1930-1944. [PMID: 32327700 DOI: 10.1038/s41379-020-0542-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 03/26/2020] [Accepted: 03/26/2020] [Indexed: 12/19/2022]
Abstract
NFATc2-rearranged sarcomas (NFATc2-Sarcomas) are infrequent round cell tumors characterized by EWSR1-NFATc2 fusions and FUS-NFATc2 fusions. Although our knowledge on these neoplasms has increased recently, novel diagnostic tools and more comprehensive series are still needed. Here, we describe the features of a series of seven molecularly confirmed NFATc2-Sarcomas (EWSR1-NFATc2, n = 4; FUS-NFATc2, n = 3) and demonstrate the utility of AGGRECAN immunohistochemistry for their identification. Patients were four males and three females, ranging in age from 19 to 66 years (median: 33). All were primary bone tumors (femur, n = 4; tibia, n = 2; ilium, n = 1), frequently infiltrating the surrounding soft tissues. Treatment often consisted of neoadjuvant chemotherapy and surgery. Follow-up was available for six patients (median 18 months, range 5-102 months), three patients died of disease and four patients are currently alive. Histologically, tumors consisted of monotonous round cells growing in lobules and sheets in variable amounts of fibrous to myxoid stroma. Other findings included spindle cells, corded and trabecular architecture, nuclear pleomorphism, cartilaginous differentiation, and osteoid-like matrix. Histological response to neoadjuvant chemotherapy was poor in all resection specimens available for review (n = 4). Tumors were diffusely positive for AGGRECAN and CD99 (7/7), and a subset expressed Pan-Keratin (AE1-AE3; 3/6), S100 (2/6), BCOR (2/6), ETV-4 (2/5), WT1 (2/6), and ERG (2/5). Desmin, NKX3-1, and SATB2 were negative (0/6). Diffuse AGGRECAN staining was also seen in 8/129 round cell sarcomas used for comparison, including mesenchymal chondrosarcoma (7/26) and CIC-sarcoma (1/26). Array-CGH showed complex karyotypes with recurrent deletions of tumor suppressor genes (CDKN2A/B, TUSC7, and DMD) in three FUS-NFATC2 cases and a simpler profile without homozygous losses in one EWSR1-NFATc2 case. Segmental chromosomal gains covering the loci of the fusion genes were detected in both variants. Overall, our study confirms and expands previous observations on NFATc2-sarcomas and supports that AGGRECAN is a useful biomarker of these tumors.
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Affiliation(s)
- Raul Perret
- Department of Biopathology, Bergonie Institute, Bordeaux, France.
| | - Julien Escuriol
- Department of Biopathology, Bergonie Institute, Bordeaux, France.,Bordeaux University, Talence, France
| | - Valérie Velasco
- Department of Biopathology, Bergonie Institute, Bordeaux, France
| | - Laetitia Mayeur
- Department of Biopathology, Bergonie Institute, Bordeaux, France
| | - Isabelle Soubeyran
- Department of Biopathology, Bergonie Institute, Bordeaux, France.,INSERM U1218, ACTION Unit, Bordeaux, France
| | - Christophe Delfour
- Department of Pathology, Montpellier University Hospital, Montpellier, France
| | - Sébastien Aubert
- Department of Pathology, Institut de Pathologie, Univ. Lille, CHU Lille, F-59000, Lille, France
| | - Marc Polivka
- Department of Pathology, APHP, Hôpital Cochin, DMU Imagina, Université de Paris, F-75014, Paris, France
| | - Marie Karanian
- Department of Pathology, Leon Berard Center, Lyon, France.,Univ Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Cancer Research Center of Lyon, Lyon, France
| | | | - Sophie Le Guellec
- Department of Pathology, Claudius Regaud Institute, Toulouse-Oncopole, Toulouse, France
| | - Noelle Weingertner
- Department of Pathology, Strasbourg Regional University Hospital (Hautepierre Hospital), Strasbourg, France
| | - Sylvia Hoeller
- Department of Pathology, Hospital of the University of Basel, Basel, Switzerland
| | - Jean-Michel Coindre
- Department of Biopathology, Bergonie Institute, Bordeaux, France.,Bordeaux University, Talence, France
| | | | - Gaëlle Pierron
- Department of Tumor Biology, Curie Institute, Paris, France
| | - Franck Tirode
- Univ Lyon, Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Cancer Research Center of Lyon, Lyon, France
| | - François Le Loarer
- Department of Biopathology, Bergonie Institute, Bordeaux, France. .,Bordeaux University, Talence, France. .,INSERM U1218, ACTION Unit, Bordeaux, France.
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