1
|
Rotaru V, Chitoran E, Mitroiu MN, Ionescu SO, Neicu A, Cirimbei C, Alecu M, Gelal A, Prie AD, Simion L. Intestinal Clear Cell Sarcoma-A Case Presentation of an Extremely Rare Tumor and Literature Review. MEDICINA (KAUNAS, LITHUANIA) 2024; 60:847. [PMID: 38929464 PMCID: PMC11205295 DOI: 10.3390/medicina60060847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 05/16/2024] [Accepted: 05/20/2024] [Indexed: 06/28/2024]
Abstract
Background: Clear cell sarcoma (CCS) is an extremely rare form of sarcoma representing less than 1% of all soft-tissue sarcomas. It has morphological, structural, and immunohistochemical similarities to malignant melanoma, affecting young adults and equally affecting both sexes, and is usually located in the tendinous sheaths and aponeuroses of the limbs. Gastrointestinal localization is exceptional, with less than 100 cases reported thus far. The gene fusion of activating transcription factor 1 (ATF1) and the Ewing sarcoma breakpoint region 1 (EWSR1) are pathognomonic for clear cell sarcoma, representing the key to the diagnosis. CCS is an extremely aggressive tumor, with >30% having distant or lymphatic metastasis at the time of diagnostic, and it has a high recurrence rate of over 80% in the first year after diagnosis and a high tendency for metastatic dissemination. Given the rarity of this tumor, there is no standardized treatment. Early diagnosis and radical surgery are essential in the treatment of CCS both for the primary tumor and for recurrence or metastasis. Chemo-radiotherapy has very little effect and is rarely indicated, and the role of targeted therapies is still under investigation. Case presentation: We present an extremely rare case of intestinal CSS in a 44-year-old Caucasian female. The patient, asymptomatic, first presented for a routine checkup and was diagnosed with mild iron-deficiency anemia. Given her family history of multiple digestive cancers, additional investigations were requested (gastroscopy, colonoscopy, tumoral markers and imaging) and the results were all within normal limits. In the subsequent period, the patient experienced mild diffuse recurrent abdominal pain, which occurred every 2-3 months. Two years later, the patient presented with symptoms of intestinal obstruction and underwent an emergency laparotomy followed by segmental enterectomy and regional lymphadenectomy for stenotic tumor of the jejunum. Histology, immunohistochemistry, and genetic testing established the diagnosis of CCS. No adjuvant therapy was indicated. Initially, no signs of recurrence or metastasis were detected, but after 30 and 46 months, respectively, from the primary treatment, the patient developed liver metastasis and pericolic peritoneal implants treated by atypical hepatic resections and right hemicolectomy. The patient remains under observation.
Collapse
Affiliation(s)
- Vlad Rotaru
- General Surgery Department 10, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
- General Surgery and Surgical Oncology Department I, Bucharest Institute of Oncology “Prof. Dr. Al. Trestioreanu”, 022328 Bucharest, Romania
| | - Elena Chitoran
- General Surgery Department 10, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
- General Surgery and Surgical Oncology Department I, Bucharest Institute of Oncology “Prof. Dr. Al. Trestioreanu”, 022328 Bucharest, Romania
| | - Madalina Nicoleta Mitroiu
- General Surgery and Surgical Oncology Department I, Bucharest Institute of Oncology “Prof. Dr. Al. Trestioreanu”, 022328 Bucharest, Romania
| | - Sinziana Octavia Ionescu
- General Surgery Department 10, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
- General Surgery and Surgical Oncology Department I, Bucharest Institute of Oncology “Prof. Dr. Al. Trestioreanu”, 022328 Bucharest, Romania
| | - Ariana Neicu
- Pathology Department, Bucharest Institute of Oncology “Prof. Dr. Al. Trestioreanu”, 022328 Bucharest, Romania
| | - Ciprian Cirimbei
- General Surgery Department 10, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
- General Surgery and Surgical Oncology Department I, Bucharest Institute of Oncology “Prof. Dr. Al. Trestioreanu”, 022328 Bucharest, Romania
| | - Mihnea Alecu
- General Surgery Department 10, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
- General Surgery and Surgical Oncology Department I, Bucharest Institute of Oncology “Prof. Dr. Al. Trestioreanu”, 022328 Bucharest, Romania
| | - Aisa Gelal
- General Surgery and Surgical Oncology Department I, Bucharest Institute of Oncology “Prof. Dr. Al. Trestioreanu”, 022328 Bucharest, Romania
| | - Andra Delia Prie
- General Surgery and Surgical Oncology Department I, Bucharest Institute of Oncology “Prof. Dr. Al. Trestioreanu”, 022328 Bucharest, Romania
| | - Laurentiu Simion
- General Surgery Department 10, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania
- General Surgery and Surgical Oncology Department I, Bucharest Institute of Oncology “Prof. Dr. Al. Trestioreanu”, 022328 Bucharest, Romania
| |
Collapse
|
2
|
Jia Y, Yan Y, Hebbard P, Garvin G, Lu MV. Malignant Gastrointestinal Neuroectodermal Tumor (GNET) Mimicking Small Bowel Lymphoma: A Case Report. Cureus 2024; 16:e59105. [PMID: 38803719 PMCID: PMC11128377 DOI: 10.7759/cureus.59105] [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] [Accepted: 04/26/2024] [Indexed: 05/29/2024] Open
Abstract
A malignant gastrointestinal neuroectodermal tumor (GNET) is a rare entity, characterized as a malignant mesenchymal neoplasm occurring exclusively near the gastrointestinal tract, prone to frequent local recurrence and metastasis. Here, we report a case of a 49-year-old male presented with abdominal pain and weight loss. The patient had a remote history of thymic B-cell lymphoma. An abdominal computed tomography (CT) scan revealed a focal wall thickening of the terminal ileum with mesenteric lymphadenopathy, suggestive of lymphoma. A core needle biopsy of the mesenteric node was inconclusive. A right hemicolectomy was subsequently performed. Histologically, abundant multinucleated osteoclast-like giant cells are present. The tumor cells show diffuse strong positivity for S100 and SOX10. EWSR1-ATF1 gene fusion was identified by fluorescence in situ hybridization (FISH), consistent with a diagnosis of GNET. This case emphasizes a diagnostic challenge of a rare malignancy.
Collapse
Affiliation(s)
- Yong Jia
- Department of Pathology, University of Manitoba, Winnipeg, CAN
| | - Yi Yan
- Department of Radiology, University of Manitoba, Winnipeg, CAN
- Department of Medical Imaging, St. Joseph's Health Care, London, CAN
| | - Pamela Hebbard
- Department of Surgical Oncology, University of Manitoba, Winnipeg, CAN
| | - Gregory Garvin
- Department of Medical Imaging, St. Joseph's Health Care, London, CAN
| | - Miao Vivian Lu
- Department of Pathology, University of Manitoba, Winnipeg, CAN
| |
Collapse
|
3
|
Boșoteanu M, Cristian M, Așchie M, Baz RA, Zielonka AM, Cozaru GC, Boșoteanu LA. The Malignant Gastrointestinal Neuroectodermal Tumor (GNET): A Distinct Entity and the Challenging Differential Diagnosis with Mesenchymal, Lymphoid, and Melanic Tumors: A Case Report and Brief Review of the Literature. Diagnostics (Basel) 2023; 13:diagnostics13061131. [PMID: 36980439 PMCID: PMC10047330 DOI: 10.3390/diagnostics13061131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/12/2023] [Accepted: 03/13/2023] [Indexed: 03/19/2023] Open
Abstract
(1) Background: A malignant gastrointestinal neuroectodermal tumor (GNET) is an ultra-rare primary neoplasm with a distinctive histopathological, immunohistochemical, molecular, and ultramicroscopic profile, synonymous terminology with clear cell sarcoma-like tumor of the gastrointestinal tract. This case report aims to describe a case of GNET with challenging mesenchymal, lymphoid, and melanic tumor differential diagnosis. (2) Case presentation: We discuss the case of a 67-year-old male patient who presented with diffuse abdominal pain, intermittent lack of intestinal transit, and frequent episodes of nausea, followed by segmental resection of the jejunum and sigmoid colon. The patient had no relevant medical history. The surgical specimen underwent immunohistochemical staining and morphological evaluation. (3) Results: Histopathological analysis reveals a moderately homogeneous polyhedral-epithelioid and spindle cell neoplastic proliferation with a zonal discohesive pattern and extensive and focal fasciculated architecture. Twenty monoclonal antibodies were used for immunostaining, which allowed GNET to be diagnosed on the basis of the tumoral immune profile, characterized by positive reactivity of S100, SOX10, and CD 56. (4) Conclusions: The poor prognosis of GNET is highlighted in the present study, along with the vital importance of differential diagnosis issues with mesenchymal, lymphoid, and melanic tumors, which make the diagnosis difficult for both pathologists and clinicians.
Collapse
Affiliation(s)
- Mădălina Boșoteanu
- Faculty of Medicine, “Ovidius” University of Constanta, 900470 Constanta, Romania
- Department of Clinical Pathology, “Sf. Apostol Andrei” Emergency County Hospital, 900591 Constanta, Romania
- Department of Pathology, “Ovidius” Clinical Hospital, 905900 Constanta, Romania
| | - Miruna Cristian
- Faculty of Medicine, “Ovidius” University of Constanta, 900470 Constanta, Romania
- Department of Clinical Pathology, “Sf. Apostol Andrei” Emergency County Hospital, 900591 Constanta, Romania
- Center for Research and Development of the Morphological and Genetic Studies of Malignant Pathology—CEDMOG, “Ovidius” University of Constanta, 900591 Constanta, Romania
- Institute of Doctoral Studies, School of Medicine, “Ovidius” University of Constanta, 900573 Constanta, Romania
- Correspondence: (M.C.); (R.A.B.); Tel.: +40-735-868-090 (M.C.)
| | - Mariana Așchie
- Department of Clinical Pathology, “Sf. Apostol Andrei” Emergency County Hospital, 900591 Constanta, Romania
- Center for Research and Development of the Morphological and Genetic Studies of Malignant Pathology—CEDMOG, “Ovidius” University of Constanta, 900591 Constanta, Romania
- Academy of Medical Sciences, 030167 Bucharest, Romania
| | - Radu Andrei Baz
- Faculty of Medicine, “Ovidius” University of Constanta, 900470 Constanta, Romania
- Department of Radiology, “Sf. Apostol Andrei” Emergency County Hospital, 900591 Constanta, Romania
- Correspondence: (M.C.); (R.A.B.); Tel.: +40-735-868-090 (M.C.)
| | | | - Georgeta Camelia Cozaru
- Department of Clinical Pathology, “Sf. Apostol Andrei” Emergency County Hospital, 900591 Constanta, Romania
- Center for Research and Development of the Morphological and Genetic Studies of Malignant Pathology—CEDMOG, “Ovidius” University of Constanta, 900591 Constanta, Romania
| | - Luana Andreea Boșoteanu
- Institute of Doctoral Studies, School of Medicine, “Ovidius” University of Constanta, 900573 Constanta, Romania
- Dermatology Department, “Elias” Emergency University Hospital, 011461 Bucharest, Romania
| |
Collapse
|
4
|
Kandler T, Cortez E, Clinton L, Hemmerich A, Ahmed O, Wong R, Forns T, MacNeill AJ, Hamilton TD, Khorasani M, Feng X. A Case Series of Metastatic Malignant Gastrointestinal Neuroectodermal Tumors and Comprehensive Genomic Profiling Analysis of 20 Cases. Curr Oncol 2022; 29:1279-1297. [PMID: 35200608 PMCID: PMC8870546 DOI: 10.3390/curroncol29020109] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/02/2022] [Accepted: 02/14/2022] [Indexed: 12/23/2022] Open
Abstract
Malignant gastrointestinal neuroectodermal tumor (GNET) is an ultra-rare soft tissue sarcoma, therefore often misdiagnosed and has no available standard treatment. Here, we report 3 cases of metastatic GNET with variable clinical courses. Our small case series as well as extensive literature review, further support that GNET is a spectrum of diseases with variable inherent biology and prognosis. Surgical management in the setting of recurrent/metastatic disease may be appropriate for GNET with indolent nature. Response to systemic treatments including chemotherapy and targeted treatments is variable, likely related to heterogenous biology as well. Furthermore, we retrospectively identified 20 additional GNET cases from Foundation Medicine’s genomic database and expanded on their clinicopathological and genomic features. Comprehensive genomic profiling (CGP) with DNA and RNA sequencing of this cohort, in the course of clinical care, demonstrated recurrent EWSR1 chromosomal rearrangements and a sparsity of additional recurrent or driver genomic alterations. All cases had low tumor mutational burden (TMB) and were microsatellite stable.
Collapse
Affiliation(s)
- Taylor Kandler
- Department of Medicine, University of British Columbia, Vancouver, BC V6T 1Z3, Canada;
| | - Eliane Cortez
- Foundation Medicine, Inc., Cambridge, MA 02141, USA;
| | - Lani Clinton
- Foundation Medicine, Inc., Morrisville, NC 27560, USA; (L.C.); (A.H.)
| | - Amanda Hemmerich
- Foundation Medicine, Inc., Morrisville, NC 27560, USA; (L.C.); (A.H.)
| | - Osama Ahmed
- Department of Medical Oncology, Saskatoon Cancer Center, Saskatoon, SK S7N 4H4, Canada;
| | - Ralph Wong
- Department of Medical Oncology, Cancer Care Manitoba, Winnipeg, MB R3E 0V9, Canada;
| | - Taylor Forns
- Department of Pathology, Duke University, Durham, NC 27710, USA;
| | - Andrea J. MacNeill
- Department of Surgery, University of British Columbia, Vancouver, BC V5Z 1M9, Canada; (A.J.M.); (T.D.H.); (M.K.)
| | - Trevor D. Hamilton
- Department of Surgery, University of British Columbia, Vancouver, BC V5Z 1M9, Canada; (A.J.M.); (T.D.H.); (M.K.)
| | - Mohammadali Khorasani
- Department of Surgery, University of British Columbia, Vancouver, BC V5Z 1M9, Canada; (A.J.M.); (T.D.H.); (M.K.)
| | - Xiaolan Feng
- Department of Medicine, University of British Columbia, Vancouver, BC V6T 1Z3, Canada;
- Department of Medical Oncology, Tom Baker Cancer Center, Calgary, AB T2N 4N2, Canada
- Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
- Correspondence:
| |
Collapse
|
5
|
Agaimy A. [Mesenchymal tumors and tumor-like lesions of the gastrointestinal tract: an overview]. DER PATHOLOGE 2022; 43:31-44. [PMID: 34919183 DOI: 10.1007/s00292-021-01040-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/15/2021] [Indexed: 06/14/2023]
Abstract
Mesenchymal tumors and tumor-like lesions of the gastrointestinal (GI) tract are uncommon. They vary from reactive tumefactive lesions and benign neoplasms to highly aggressive sarcomas. Among them, GI stromal tumors (GISTs) are most common, followed, with less frequency, by smooth muscle and neurogenic tumors. The major challenge resides in correctly identifying GISTs and providing a comprehensive report (including risk assessment and genotyping) that represents the basis for an optimized surgical-oncological treatment and/or adjuvant therapy. On the other hand, the challenge of benign lesions is to find a good name (well understandable and reproducible diagnostic term) that helps avoid diagnostic ambiguity and prognostic uncertainty so that overprognostication and overtreatment can be prevented. Moreover, several recently described genetically defined benign and malignant entities need be correctly diagnosed due to their special "targeted" therapeutic options and to further characterize their clinicopathological and biological properties in the future. These recent entities include aggressive epithelioid inflammatory myofibroblastic sarcoma (ALK-RANBP2-driven), malignant gastrointestinal neuroectodermal tumor (EWSR1-ATF1/CREB-related), NTRK-rearranged neoplasms, and, most recently, colorectal NUTM1-rearranged sarcomas. This review highlights the major clinicopathological features of gastrointestinal mesenchymal lesions in light of recent developments.
Collapse
Affiliation(s)
- Abbas Agaimy
- Pathologisches Institut, Universitätsklinikum Erlangen, Krankenhausstraße 8-10, 91054, Erlangen, Deutschland.
| |
Collapse
|
6
|
Adhya A, Mishra P, Biswas D, Pattnaik S, Patra S, Muduly D, Balasubiramaniyan V. Malignant gastrointestinal neuroectodermal tumor: A case-based review of literature. J Cancer Res Ther 2022; 18:885-897. [DOI: 10.4103/jcrt.jcrt_829_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
|
7
|
Malignant Gastrointestinal Neuroectodermal Tumour-Case Report with Review of Literature. J Gastrointest Cancer 2021; 52:1125-1130. [PMID: 33523361 DOI: 10.1007/s12029-020-00575-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2020] [Indexed: 12/22/2022]
|
8
|
Zhu P, Zhang T, Bi K, Wu Y, Chen X, Zhang H, Huang D, Zhang L, Zeng Y, Yi X. Primary Clear Cell Sarcoma of the Ileum: A Case Report With Next-Generation Sequencing Analysis. Int J Surg Pathol 2021; 29:677-684. [PMID: 33412984 DOI: 10.1177/1066896920985311] [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
As the concept of clear cell sarcoma-like tumor or malignant gastrointestinal neuroectodermal tumor (CCS-LT/MGNET) has been widely accepted, primary CCS of the gastrointestinal tract (CCS-GI) is becoming a rare entity. In this article, we describe a case of primary CCS-GI that occurred in the ileum of a 65-year-old male to further illustrate its rare occurrence. Similar to CCS of soft tissue (CCS-ST), the tumor was composed of spindled to epithelioid cells displaying fascicular, nested, or pseudopapillary arrangement. The tumor cells had large round to ovoid nuclei with vesicular chromatin and prominent nucleoli, containing eosinophilic to pale cytoplasm. In contrast to CCS-LT/MGNET, immunohistochemical study also showed variable positivity of HMB45, melan A, and MiTF besides the strong and diffuse staining of S100 protein and SOX10. Fluorescence in situ hybridization (FISH) using fusion probes identified EWSR1 and ATF1 genes rearrangement. Next-generation sequencing (NGS) analysis further revealed EWSR1 exons9/8-ATF1 exon4 and ATF1 exon3- EWSR1 exon11 fusion genes. CCS-GI and CCS-LT/MGNET possibly represent 2 related entities of the same spectrum, which differentiate along 2 different pathways.
Collapse
Affiliation(s)
- Peipei Zhu
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Tingting Zhang
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Ke Bi
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yunjin Wu
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xue Chen
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Haoyang Zhang
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Dandan Huang
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Long Zhang
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yu Zeng
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xianghua Yi
- Department of Pathology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| |
Collapse
|
9
|
Okada T, Hirano Y, Ishikawa S, Kondo H, Ishii T, Yamaguchi S. A long-term survivor of clear cell sarcoma-like tumor of the gastrointestinal tract with liver metastasis: a case report. Surg Case Rep 2020; 6:260. [PMID: 33025168 PMCID: PMC7538498 DOI: 10.1186/s40792-020-01028-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 09/23/2020] [Indexed: 01/10/2023] Open
Abstract
Background Clear cell sarcoma-like tumor of the gastrointestinal tract (CCSLTGT) is extremely rare. It is a mesenchymal neoplasm that usually forms in the small intestine of adolescents and young adults, is prone to local recurrence and metastasis, and has a high mortality rate. We report a patient with CCSLTGT with lymph node- and liver metastases, who continues to survive 6 years after initial surgical resection. Case presentation A 38-year-old woman presented with lightheadedness. Laboratory analysis revealed anemia (hemoglobin, 6.7 g/dL), and enhanced computed tomography (CT) demonstrated a mass in the small intestine, about 6 cm in diameter, with swelling of 2 regional lymph nodes. Double-balloon small intestine endoscopic examination revealed a tumor accompanied by an ulcer; the biopsy findings suggested a primary cancer of the small intestine. She was admitted, and we then performed a laparotomy for partial resection of the small intestine with lymph node dissection. Pathologic examination revealed CCSLTGT with regional lymph node metastases. About 3 years later, follow-up CT revealed a single liver metastasis. Consequently, she underwent a laparoscopic partial liver resection. Histopathologic examination confirmed that the liver metastasis was consistent with CCSLTGT. It has now been 3 years without a recurrence. Conclusion Repeated radical surgical resection with close follow-up may be the only way to achieve long-term survival in patients with CCLSTGT.
Collapse
Affiliation(s)
- Takuhisa Okada
- Department of Gastroenterological Surgery, Saitama Medical University International Medical Center, 1397-1, Yamane, Hidaka-City, Saitama-Pref, 350-1298, Japan. .,Department of General Surgical Science, Gunma University Graduate School of Medicine, 3-39-22 Showa-Machi, Maebashi-City, Gunma-Pref, 371-8511, Japan.
| | - Yasumitsu Hirano
- Department of Gastroenterological Surgery, Saitama Medical University International Medical Center, 1397-1, Yamane, Hidaka-City, Saitama-Pref, 350-1298, Japan
| | - Shintaro Ishikawa
- Department of Gastroenterological Surgery, Saitama Medical University International Medical Center, 1397-1, Yamane, Hidaka-City, Saitama-Pref, 350-1298, Japan
| | - Hiroka Kondo
- Department of Gastroenterological Surgery, Saitama Medical University International Medical Center, 1397-1, Yamane, Hidaka-City, Saitama-Pref, 350-1298, Japan
| | - Toshimasa Ishii
- Department of Gastroenterological Surgery, Saitama Medical University International Medical Center, 1397-1, Yamane, Hidaka-City, Saitama-Pref, 350-1298, Japan
| | - Shigeki Yamaguchi
- Department of Gastroenterological Surgery, Saitama Medical University International Medical Center, 1397-1, Yamane, Hidaka-City, Saitama-Pref, 350-1298, Japan
| |
Collapse
|
10
|
Gadde R, Linos K, Lisovsky M, Kerrigan T, Loehrer AP, Kasumova G, Kerr DA, Liu X. Fine Needle Aspiration Cytology of Malignant Digestive System Gastrointestinal Neuroectodermal Tumor in a Lymph Node Metastasis from a Previously Diagnosed Liver Primary: A Case Report and Review of Literature. Diagn Cytopathol 2020; 49:E130-E136. [PMID: 32975903 DOI: 10.1002/dc.24624] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/26/2020] [Accepted: 09/16/2020] [Indexed: 01/22/2023]
Abstract
Malignant gastrointestinal neuroectodermal tumor (GNET) is an extremely rare neoplasm. Immunohistochemically, GNET typically demonstrates neural differentiation but lacks melanocytic differentiation, making it distinct from clear cell sarcoma of the soft tissues (CCS). Herein we report for the first time the cytomorphologic features of lymph node metastasis from presumably liver GNET. A 36-year-old female presented with fevers, night sweats, loss of appetite, and a 20-lbs weight loss. Radiographic imaging showed a 13 cm heterogeneously enhancing mass in the right lobe of the liver and a hypermetabolic 0.9 cm periportal lymph node on positron emission tomography-computed tomography (PET/CT). Initially, a CT-guided liver biopsy was performed followed by right hepatic lobectomy and portal lymphadenectomy. The liver biopsy and resection showed an S100-protein and SOX10 positive malignant neoplasm and genomic profiling of liver biopsy revealed EWSR1-CREB1gene rearrangement. These findings in conjunction with the morphologic and immunohistochemical profile were diagnostic of GNET. Two months later, she presented with recurrent lymphadenopathy in the upper abdomen. Fine needle aspiration of the periportal nodal mass revealed single and clusters of primitive, large to medium-sized neoplastic cells with round to oval nuclei, high nuclear-cytoplasmic ratio, vesicular chromatin, and prominent nucleoli. The tumor cells were S100 protein and SOX10 positive, consistent with metastasis of the patient's recently diagnosed malignant digestive system GNET. Palliative chemotherapy was administered but the patient died a few days later, 4 months from the initial diagnosis. Awareness of this entity and judicial use of ancillary studies including molecular testing are essential for achieving accurate diagnosis.
Collapse
Affiliation(s)
- Ramya Gadde
- Department of Pathology and Laboratory Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA.,Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Konstantinos Linos
- Department of Pathology and Laboratory Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA.,Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Mikhail Lisovsky
- Department of Pathology and Laboratory Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA.,Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Timothy Kerrigan
- Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA.,Department of Radiology, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA
| | - Andrew P Loehrer
- Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA.,Department of Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA.,The Dartmouth Institute for Health Policy and Clinical Practice, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Gyulnara Kasumova
- Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA.,Department of Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA
| | - Darcy A Kerr
- Department of Pathology and Laboratory Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA.,Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Xiaoying Liu
- Department of Pathology and Laboratory Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA.,Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| |
Collapse
|
11
|
Systemic treatment of malignant gastrointestinal neuroectodermal tumour after childhood neuroblastoma: chemotherapy in malignant gastrointestinal neuroectodermal tumour. Anticancer Drugs 2020; 30:959-963. [PMID: 31517734 DOI: 10.1097/cad.0000000000000806] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Malignant gastrointestinal neuroectodermal tumour is an extremely rare neoplasm that arises in the wall of the small bowel, stomach or large bowel in young-aged and middle-aged adults. Histologically, it is generally characterized by monomorphic cells with clear cytoplasma, S-100 protein expression, and EWSR1 gene translocation. To the best of our knowledge, we describe for the first time, the case of a young woman with a diagnosis of metastatic gastrointestinal neuroectodermal tumour arising from ileum, who had a childhood adrenal neuroblastoma with liver, bone and lymph nodes metastasis, treated with four cycles of chemotherapy with the schedule CADO-CVP (CADO: cyclophosphamide 300 mg/m/day on days 1-5, vincristine 1,5 mg/m/day on days 1 and 5, and doxorubicin 60 mg/m/day on day 5; CVP: cisplatin 40 mg/m/day on days 1-5 and etoposide 100 mg/m/day on days 1-5) followed by right adrenal, kidney, lymph nodes and liver lesion resection, conditioning chemotherapy (melphalan-carmustine-teniposide), stem cells autologous transplantation and consecutively radiotherapy on the spine (T9 to L3) for a total of 30 Gy. For the second diagnosis of gastrointestinal neuroectodermal tumour with liver metastasis, she underwent ileal tumour resection and platinum-anthracycline based chemotherapy with initial shrinkage of liver metastasis. Unfortunately, despite the initial response and the following delivered therapies, she died for rapid progressive disease. Taking into account the late effects of past therapeutic modalities, a long-term surveillance of young child treated for neuroblastoma, is required to appreciate their overall risks of second malignancies.
Collapse
|
12
|
White-Gilbertson S, Voelkel-Johnson C. Giants and monsters: Unexpected characters in the story of cancer recurrence. Adv Cancer Res 2020; 148:201-232. [PMID: 32723564 DOI: 10.1016/bs.acr.2020.03.001] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Polyploid giant cancer cells (PGCC) constitute a dangerous subpopulation of cancer cells and are a driving force in cancer recurrence. These unique cells arise from diploid tumor cells in response to stress encountered in the tumor microenvironment or during cancer therapy. PGCC are greatly dedifferentiated, acquire pluripotency, and are able to replicate through a form of asymmetric division called neosis, which results in new populations that are themselves able to differentiate into new cell types or to re-establish tumors. Progeny tend to be more genetically unstable than the founding population due to the dysregulation required to transition through a PGCC state. Therefore, cancers that escape stressors through this mechanism tend to re-emerge with a more aggressive phenotype that is therapy resistant. This review focuses on the clinical significance of PGCC, the need for standardized nomenclature and molecular markers, as well as possible avenues to develop therapies aimed at PGCC and the process of neosis. The biology underlying the development of PGCC including cell cycle checkpoint dysregulation, stress responses, dedifferentiation, stemness and epithelial-mesenchymal transition is discussed.
Collapse
Affiliation(s)
- Shai White-Gilbertson
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, United States
| | - Christina Voelkel-Johnson
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, United States.
| |
Collapse
|
13
|
Askan G, Kombak FE, Seven IE, Basturk O. Clear Cell Sarcoma-Like Tumor of the Gastrointestinal Tract. J Gastrointest Cancer 2020; 50:651-656. [PMID: 29623567 DOI: 10.1007/s12029-018-0069-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Gokce Askan
- Department of Pathology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10021, USA
| | - Faruk Erdem Kombak
- Department of Pathology, Marmara University School of Medicine, Istanbul, Turkey
| | - Ipek Erbarut Seven
- Department of Pathology, Marmara University School of Medicine, Istanbul, Turkey
| | - Olca Basturk
- Department of Pathology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10021, USA.
| |
Collapse
|
14
|
Malignant gastrointestinal neuroectodermal tumour (GNET): neural mesenchymal tumours of the gastrointestinal tract with striking histology and EWSR1 gene rearrangement. Pathology 2019; 51:324-327. [PMID: 30833127 DOI: 10.1016/j.pathol.2018.09.066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 09/10/2018] [Accepted: 09/14/2018] [Indexed: 11/23/2022]
|
15
|
Huang GX, Chen QY, Zhong LL, Chen H, Zhang HP, Liu XF, Tang F. Primary malignant gastrointestinal neuroectodermal tumor occurring in the ileum with intra-abdominal granulomatous nodules: A case report and review of the literature. Oncol Lett 2019; 17:3899-3909. [PMID: 30930990 PMCID: PMC6425295 DOI: 10.3892/ol.2019.10060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 01/31/2019] [Indexed: 12/26/2022] Open
Abstract
Malignant gastrointestinal neuroectodermal tumors (GNETs) are rare aggressive malignant neoplasms that exclusively occur within the wall of the gastrointestinal tract. The GNET was first described as an ‘osteoclast-rich tumor of the gastrointestinal tract with features resembling clear cell sarcoma (CCS) of soft parts’ in 2003. Although the GNET shares certain histological features with CCS, it is characterized by a lack of melanocytic differentiation and the presence of non-tumoral osteoclast-like giant cells (OLGCs). The present study reports a case of a GNET of the ileum with intra-abdominal granulomatous nodules, an uncommon accompanying finding, and summarizes the current literature. A 30-year-old woman presented with the symptoms of intestinal obstruction, and a mass was found within the ileum wall. Multiple grey-white nodules were found adhering to the omentum and serosa of the ileum. Histologically, the tumor was located in the muscularis propria and infiltrated the mucosa and the serosa. Tumor cells presented with oval or polygonal nuclei and prominent nucleoli, and were predominantly arranged in nested and pseudopapillary patterns, with the presence of cluster of differentiation (CD)68-positive, scattered OLGC. Immunohistochemically, it was determined that the tumor cells expressed Vimentin, CD56, S-100 and transcription factor SOX-10, while being negative for pan-cytokeratin, cytokeratin (CK)7, CK20, synaptophysin, chromogranin-A, CD117, anoctamin-1, CD34, human melanoma black-45, Melan-A, smooth muscle actin, CD3 and CD20 expression. Ewing sarcoma breakpoint region 1 gene rearrangement was identified by fluorescence in situ hybridization analysis. Ultrastructurally, no typical melanosomes were identified. In addition, the intra-abdominal grey-white nodules were microscopically identified as chronic granulomatous inflammation. The patient received four cycles of adjuvant chemotherapy following routine tumor resection. Due to its rarity and histological similarity with other neoplasms, unfamiliarity with the features of GNETs by surgical pathologists can easily lead to a misdiagnosis. Therefore, comprehensive assessments, including morphology and ancillary studies, are required for an accurate diagnosis of GNET.
Collapse
Affiliation(s)
- Gao-Xiang Huang
- Department of Pathology, 924th (181st) Hospital of The People's Liberation Army, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, Guangxi 541002, P.R. China
| | - Qiu-Yue Chen
- Department of Pathology, 924th (181st) Hospital of The People's Liberation Army, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, Guangxi 541002, P.R. China
| | - Ling-Ling Zhong
- Department of Pathology, 924th (181st) Hospital of The People's Liberation Army, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, Guangxi 541002, P.R. China
| | - Hao Chen
- Department of Pathology, 924th (181st) Hospital of The People's Liberation Army, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, Guangxi 541002, P.R. China
| | - Hai-Peng Zhang
- Department of Pathology, 924th (181st) Hospital of The People's Liberation Army, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, Guangxi 541002, P.R. China
| | - Xiao-Fen Liu
- Department of Pathology, 924th (181st) Hospital of The People's Liberation Army, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, Guangxi 541002, P.R. China
| | - Fang Tang
- Department of Pathology, 924th (181st) Hospital of The People's Liberation Army, Guangxi Key Laboratory of Metabolic Diseases Research, Guilin, Guangxi 541002, P.R. China
| |
Collapse
|
16
|
Allanson BM, Weber MA, Jackett LA, Chan C, Lau L, Ziegler DS, Warby M, Mayoh C, Cowley MJ, Tucker KM, Long GV, Maher A, Anazodo A, Scolyer RA. Oral malignant gastrointestinal neuroectodermal tumour with junctional component mimicking mucosal melanoma. Pathology 2018; 50:648-653. [PMID: 30177220 DOI: 10.1016/j.pathol.2018.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Revised: 07/16/2018] [Accepted: 07/22/2018] [Indexed: 02/07/2023]
Abstract
Malignant gastrointestinal neuroectodermal tumour (GNET) is a recently characterised rare and aggressive tumour that typically arises in association with the small intestine of adults. We present a novel case of this entity and expand the spectrum of its reported morphological features. The patient was a 5-year-old female, the youngest reported patient affected by the condition, and presented with extra-abdominal disease. The histopathological features included the presence of a junctional component of the palatal tumour, which mimicked mucosal melanoma, a feature that has not been previously reported in GNET. Whole genome and RNA sequencing was performed that demonstrated the EWSR1-ATF1 translocation characteristic of GNET. Knowledge of this entity and its features, together with careful morphological assessment supplemented by judicious immunohistochemical and molecular studies should enable the correct diagnosis to be established.
Collapse
Affiliation(s)
- Benjamin M Allanson
- Department of Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, Sydney, NSW, Australia.
| | - Martin A Weber
- Department of Anatomical Pathology, NSW Health Pathology East, Prince of Wales Hospital/Sydney Children's Hospital, Randwick, NSW, Australia; School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Louise A Jackett
- Department of Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, Sydney, NSW, Australia; Sydney Medical School, The University of Sydney, Sydney, NSW, Australia; Melanoma Institute Australia, The University of Sydney, Sydney, NSW, Australia
| | - Charles Chan
- Sydney Medical School, The University of Sydney, Sydney, NSW, Australia; Department of Anatomical Pathology, NSW Health Pathology, Concord Repatriation General Hospital, Sydney, NSW, Australia
| | - Loretta Lau
- Kids Cancer Centre, Sydney Children's Hospital, Randwick, NSW, Australia; School of Women's and Children's Health, University of New South Wales, Sydney, NSW, Australia; Children's Cancer Institute, University of New South Wales, Sydney, NSW, Australia
| | - David S Ziegler
- Kids Cancer Centre, Sydney Children's Hospital, Randwick, NSW, Australia; School of Women's and Children's Health, University of New South Wales, Sydney, NSW, Australia; Children's Cancer Institute, University of New South Wales, Sydney, NSW, Australia
| | - Meera Warby
- Nelune Comprehensive Cancer Centre, Prince of Wales Hospital, Randwick, NSW, Australia
| | - Chelsea Mayoh
- Children's Cancer Institute, University of New South Wales, Sydney, NSW, Australia
| | - Mark J Cowley
- Children's Cancer Institute, University of New South Wales, Sydney, NSW, Australia; Kinghorn Centre for Clinical Genomics, Garvan Institute, Sydney, Australia; St Vincent's Clinical School, University of New South Wales, Sydney, NSW, Australia
| | - Katherine M Tucker
- Nelune Comprehensive Cancer Centre, Prince of Wales Hospital, Randwick, NSW, Australia; Prince of Wales Clinical School, University of New South Wales, Sydney, NSW, Australia
| | - Georgina V Long
- Sydney Medical School, The University of Sydney, Sydney, NSW, Australia; Melanoma Institute Australia, The University of Sydney, Sydney, NSW, Australia; Department of Medical Oncology, Royal North Shore Hospital, Sydney, NSW, Australia
| | - Annabelle Maher
- Department of Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, Sydney, NSW, Australia; Sydney Medical School, The University of Sydney, Sydney, NSW, Australia
| | - Antoinette Anazodo
- Kids Cancer Centre, Sydney Children's Hospital, Randwick, NSW, Australia; School of Women's and Children's Health, University of New South Wales, Sydney, NSW, Australia; Nelune Comprehensive Cancer Centre, Prince of Wales Hospital, Randwick, NSW, Australia
| | - Richard A Scolyer
- Department of Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, Sydney, NSW, Australia; Sydney Medical School, The University of Sydney, Sydney, NSW, Australia; Melanoma Institute Australia, The University of Sydney, Sydney, NSW, Australia
| |
Collapse
|
17
|
Sharma K, Yadav SK, Valluru B, Liu L. Significance of MRI in the diagnosis and differentiation of clear cell sarcoma of tendon and aponeurosis (CCSTA): A case report. Medicine (Baltimore) 2018; 97:e11012. [PMID: 30075493 PMCID: PMC6081126 DOI: 10.1097/md.0000000000011012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
RATIONALE Clear cell sarcoma of tendon and aponeurosis (CCSTA) or soft parts is a rare malignant melanin producing tumor entity that is derived from the neural crest cells originating from soft tissues displaying melanocytic differentiation. Diagnosis of CCSTA is difficult as it is dependent on age, size, location, necrosis, calcifications, cystic degeneration, and local to distant metastatic deposits. These tumors have very poor prognosis with a survival rate of 5-10 years because of local recurrence, early to late metastasis to lymph nodes, lungs, bones, and liver. PATIENT CONCERNS A 30-year-old Asian male has presented with a painful mass in the posterior aspect of the right ankle. He recalled of noticing an increase in the size of the lump after a traumatic insult 3 months ago. Physical examination revealed a mass of size 9x4 cm in the posterior ankle with no cutaneous ulcerative lesions. There is no history of any longstanding illness or malignancy. DIAGNOSES Clear cell Sarcoma of Tendon and Aponeurosis (CCSTA) or CCS of Soft parts. INTERVENTIONS Conventional radiography demonstrated merely a soft tissue mass in the posterior compartment of the right ankle and significant calcaneal bone erosion with the sparse trabecular pattern. Plain conventional tomography showed a well-defined soft tissue heterogeneous mass with a hypoattenuating osteo-destructive focal lesion in the calcaneus. Magnetic resonance imaging (MRI) - T1 weighted imaging (T1WI) revealed an iso-intense signal relative to adjacent muscle; heterogeneous high-signal intensity on fat saturated T2 weighted imaging (T2WI). On contrast examination, lesion on T1WI, showed a heterogeneous high signal intensity, central low signal intensity with peripheral and septal enhancement. The immune-histochemistry analysis was positive for HMB-45, S-100, myoD1 and Ki67 (30%). Correlating with imaging and immune-histochemistry, a confirmatory diagnosis of CCSTA was made. OUTCOMES CCSTA is typically a slowly growing painless mass in the deep soft tissues of ear, pancreas, kidney, penis, abdomen, especially in the lower extremities- Achilles tendon and aponeurosis of the ankle or in foot of young adults. As, these tumors are highly malignant, difficult to diagnose, early recognition by imaging and surgical excision are the mainstay of management. LESSONS Our case emphasizes the importance of recognizing radiological characteristics of CCSTA, and its differentiation from other soft tissue tumors, when presenting atypically. MRI plays a significant role in the diagnosis supported by histopathology and immune-histochemistry. So, radiologists should be familiar about this presentation that could guide other personnel for early detection of soft tissue tumors while including CCSTA into differential diagnosis for evaluation.
Collapse
|
18
|
Malignant Gastrointestinal Neuroectodermal Tumor: a Unique Rare Neoplasm. Indian J Surg Oncol 2017; 8:630-633. [PMID: 29204000 DOI: 10.1007/s13193-017-0654-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Accepted: 04/12/2017] [Indexed: 02/06/2023] Open
Abstract
Malignant gastrointestinal neuroectodermal tumor (GNET) is a rare malignant tumor. It is also referred to as clear cell sarcoma-like gastrointestinal tumor (CCSLGT). It is an aggressive tumor with a high rate of local recurrence, metastases, and early death from disease. Its pathogenesis is not known. It shows evidence of neural differentiation and lacks immunohistochemical and ultrastructural evidence of melanocytic differentiation. It needs to be distinguished from various mimickers owing to its aggressive course. Herein, we report a case of GNET in a 55-year-old female patient.
Collapse
|
19
|
Alyousef MJ, Alratroot JA, ElSharkawy T, Shawarby MA, Al Hamad MA, Hashem TM, Alsayyah A. Malignant gastrointestinal neuroectodermal tumor: a case report and review of the literature. Diagn Pathol 2017; 12:29. [PMID: 28320420 PMCID: PMC5359837 DOI: 10.1186/s13000-017-0620-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 03/14/2017] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Malignant gastrointestinal neuroectodermal tumor (GNET) is an extremely rare entity that was first described by Zambrano et al. in 2003 as "Clear cell sarcoma-like tumor of the gastrointestinal tract". It shares some of the histological features of clear cell sarcoma (CCS) but lacks the immunohistochemical reactivity for melanocytic markers. We report a case of GNET that was initially misdiagnosed as gastrointestinal stromal tumor (GIST). Recognizing this entity is important to avoid misdiagnosis. CASE PRESENTATION A case of an 18-year-old male presented with a small intestinal tumor. Histologically it was characterized by polygonal cells arranged in pseudoalveolar pattern and situated in the muscularis propria. Scattered osteoclast-like multinucleated giant cells were also noted. The neoplastic cells were positive for S-100 protein and negative for HMB-45, Melan A, smooth muscle actin, desmin and CD117. EWSR1 gene rearrangement was detected by fluorescence in situ hybridization (FISH) analysis. The patient returned with recurrence after 36 months' management by surgical resection and died one year later. CONCLUSIONS GNET can be mistaken histologically for other non-epithelial gastrointestinal tumors. Awareness of its existence and diagnostic criteria by the pathologist is necessary to avoid misdiagnosis, particularly as GIST, CCS or malignant peripheral nerve sheath tumor (MPNST).
Collapse
Affiliation(s)
- Mohammed J Alyousef
- Department of Pathology and Laboratory Medicine, King Fahd Hospital of University, College of Medicine, University of Dammam, Dammam, Saudi Arabia.
| | - Jumana A Alratroot
- Department of Pathology and Laboratory Medicine, King Fahd Hospital of University, College of Medicine, University of Dammam, Dammam, Saudi Arabia
| | - Tarek ElSharkawy
- Department of Pathology and Laboratory Medicine, King Fahd Hospital of University, College of Medicine, University of Dammam, Dammam, Saudi Arabia
| | - Mohamed A Shawarby
- Department of Pathology and Laboratory Medicine, King Fahd Hospital of University, College of Medicine, University of Dammam, Dammam, Saudi Arabia
| | - Mohammad A Al Hamad
- Department of Pathology and Laboratory Medicine, King Fahd Hospital of University, College of Medicine, University of Dammam, Dammam, Saudi Arabia
| | - Tarek M Hashem
- Department of Pathology and Laboratory Medicine, King Fahd Hospital of University, College of Medicine, University of Dammam, Dammam, Saudi Arabia
| | - Ahmed Alsayyah
- Department of Pathology and Laboratory Medicine, King Fahd Hospital of University, College of Medicine, University of Dammam, Dammam, Saudi Arabia
| |
Collapse
|
20
|
Han N, Kim H, Min SK, Paek SH, Park CK, Choi SH, Chae UR, Park SH. Meningeal Solitary Fibrous Tumors with Delayed Extracranial Metastasis. J Pathol Transl Med 2015; 50:113-21. [PMID: 26657311 PMCID: PMC4804146 DOI: 10.4132/jptm.2015.10.30] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 10/11/2015] [Accepted: 10/30/2015] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The term solitary fibrous tumor (SFT) is preferred over meningeal hemangiopericytoma (HPC), because NAB2-STAT6 gene fusion has been observed in both intracranial and extracranial HPCs. HPCs are now considered cellular variants of SFTs. METHODS This study analyzes 19 patients with STAT6-confirmed SFTs, who were followed for over 11 years in a single institution. Ten patients (10/19, 56.2%) had extracranial metastases (metastatic group), while the remainder (9/19) did not (non-metastatic group). These two groups were compared clinicopathologically. RESULTS In the metastatic group, the primary metastatic sites were the lungs (n = 6), bone (n = 4), and liver (n = 3). There was a mean lag time of 14.2 years between the diagnosis of the initial meningeal tumor to that of systemic metastasis. The median age at initial tumor onset was 37.1 years in the metastatic group and 52.5 in the non-metastatic group. The 10-year survival rates of the metastatic- and non-metastatic groups were 100% and 33%, respectively. The significant prognostic factors for poor outcomes on univariate analysis included advanced age (≥45 years) and large initial tumor size (≥5 cm). In contrast, the patients with higher tumor grade, high mitotic rate (≥5/10 high-power fields), high Ki-67 index (≥5%), and the presence of necrosis or CD34 positivity showed tendency of poor prognosis but these parameters were not statistically significant poor prognostic markers. CONCLUSIONS Among patients with SFTs, younger patients (<45 years) experienced longer survival times and paradoxically had more frequent extracranial metastases after long latent periods than did older patients. Therefore, young patients with SFTs require careful surveillance and follow-up for early detection of systemic metastases.
Collapse
Affiliation(s)
- Nayoung Han
- Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
| | - Hannah Kim
- Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
| | - Soo Kee Min
- Department of Pathology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Sun-Ha Paek
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul, Korea
| | - Chul-Kee Park
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul, Korea
| | - Seung-Hong Choi
- Department of Radiology, Seoul National University College of Medicine, Seoul, Korea
| | - U-Ri Chae
- Department of Industrial Engineering, Ajou University, Suwon, Korea
| | - Sung-Hye Park
- Department of Pathology, Seoul National University College of Medicine, Seoul, Korea.,Neurosicence Institute, Seoul National University College of Medicine, Seoul, Korea
| |
Collapse
|
21
|
Abstract
Soft tissue pathology is a rapidly changing subspecialty. New entities are described relatively often, and new molecular findings for soft tissue tumors are reported in the literature almost every month. This article summarizes the major features and diagnostic approach to several recently characterized entities: superficial CD34-positive fibroblastic tumor, fibrosarcoma-like lipomatous neoplasm, angiofibroma of soft tissue, low-grade sinonasal sarcoma with neural and myogenic features, malignant gastrointestinal neuroectodermal tumor, hemosiderotic fibrolipomatous tumor, and epithelioid inflammatory myofibroblastic sarcoma. Additionally, the article also provides a summary table of recent molecular findings in soft tissue tumors.
Collapse
Affiliation(s)
- Nicole N Riddle
- Department of Pathology, University of Texas Health Science Center San Antonio, 7703 Floyd Curl Drive, MC7750, San Antonio, TX 78229, USA
| | - Jerad M Gardner
- Department of Pathology, University of Arkansas for Medical Sciences, 4301 West Markham Street #517, Room S4/11, Little Rock, AR 72205, USA; Department of Dermatology, University of Arkansas for Medical Sciences, 4301 West Markham Street #517, Room S4/11, Little Rock, AR 72205, USA.
| |
Collapse
|
22
|
Shah AA, Grosh WW, Frierson HF. Malignant gastrointestinal neuroectodermal tumour of the oesophagus with pulmonary metastasis and protracted survival. Histopathology 2015; 67:927-30. [PMID: 26018740 DOI: 10.1111/his.12740] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Akeesha A Shah
- Department of Pathology, Division of Hematology and Oncology, University of Virginia, Charlottesville, VA, USA
| | - William W Grosh
- Department of Internal Medicine, Division of Hematology and Oncology, University of Virginia, Charlottesville, VA, USA
| | - Henry F Frierson
- Department of Pathology, Division of Hematology and Oncology, University of Virginia, Charlottesville, VA, USA
| |
Collapse
|
23
|
Kim SB, Lee SH, Gu MJ. Esophageal subepithelial lesion diagnosed as malignant gastrointestinal neuroectodermal tumor. World J Gastroenterol 2015; 21:5739-5743. [PMID: 25987801 PMCID: PMC4427700 DOI: 10.3748/wjg.v21.i18.5739] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 01/28/2015] [Accepted: 02/11/2015] [Indexed: 02/06/2023] Open
Abstract
A 21-year-old male visited our hospital with a complaint of aggravating dysphagia and odynophagia for a few days. Esophagogastroduodenoscopy showed huge bulging mucosa with an intact surface causing luminal narrowing at 35 cm from the incisor teeth. Endoscopic ultrasonography showed an about 35 mm sized irregular margined in-homogenous hypoechoic lesion with an obscure layer of origin. Endoscopic ultrasonography fine needle aspiration revealed spindle cell proliferation without immunoreactivity for CD117, SMA, and cytokeratin. The patient underwent excision of the subepithelial lesion at the distal esophagus. On pathologic examination of the specimen, the tumor was composed of short fascicles of oval to spindle cells with eosinophilic and clear cytoplasm and vesicular nuclei. The tumor cells were positive for S-100 and SOX10 and negative for CD117, SMA, HMB-45, melan-A, cytokeratin, and CD99. The split-apart signal was detected in EWSR1 on FISH, suggesting a malignant gastrointestinal neuroectodermal tumor. At the time of writing, the patient is on radiation therapy at the operated site of esophagus and doing well, with no recurrence for three months. Malignant gastrointestinal neuroectodermal tumor is a rare gastrointestinal tumor with features of clear cell sarcoma, without melanocytic differentiation, and shows a poor prognosis. This is the first reported case of malignant gastrointestinal neuroectodermal tumor arising as subepithelial lesion in the esophagus.
Collapse
|
24
|
Wang J, Thway K. Clear Cell Sarcoma–like Tumor of the Gastrointestinal Tract: An Evolving Entity. Arch Pathol Lab Med 2015; 139:407-412. [DOI: 10.5858/arpa.2013-0547-rs] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Clear cell sarcoma–like tumor of the gastrointestinal tract (CCSLGT) is a rare malignant neoplasm that occurs in the wall of the small bowel, stomach, or large bowel, predominantly in young adults. It is an aggressive neoplasm that frequently presents with metastatic disease and has a high mortality rate. Histologically, it is usually composed of medium-sized primitive ovoid or epithelioid cells with pale or clear cytoplasm that are arranged in sheets or in papillary or alveolar architectures. Clear cell sarcoma–like tumor of the gastrointestinal tract is positive for S100 protein, invariably negative for melanocyte-specific markers and is often also positive for neuroendocrine markers. The etiology of CCSLGT is unknown, but many studies have shown associations with EWSR1-CREB1 gene fusions and, less frequently, with EWSR1-ATF1 fusions. Here, we discuss the current status of CCSLGT, including histologic, immunophenotypic, and molecular findings.
Collapse
Affiliation(s)
- Jayson Wang
- From the Department of Histopathology, The Royal Marsden NHS Foundation Trust, London, United Kingdom
| | - Khin Thway
- From the Department of Histopathology, The Royal Marsden NHS Foundation Trust, London, United Kingdom
| |
Collapse
|
25
|
Kong J, Li N, Wu S, Guo X, Gu C, Feng Z. Malignant gastrointestinal neuroectodermal tumor: A case report and review of the literature. Oncol Lett 2014; 8:2687-2690. [PMID: 25364450 PMCID: PMC4214465 DOI: 10.3892/ol.2014.2524] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Accepted: 08/01/2014] [Indexed: 02/06/2023] Open
Abstract
Malignant gastrointestinal neuroectodermal tumor (GNET) is a rare soft tissue sarcoma, previously referred to as clear cell sarcoma-like gastrointestinal tumor (CCSLGT) and also commonly reported in the literature as clear cell sarcoma of the gastrointestinal tract (CCS-GI). The current study reports a case of GNET arising in the stomach of a 17-year-old male, who presented with symptoms of fatigue, anemia and low temperature. Examination with positron emission tomography-computed tomography revealed a soft tissue mass in the gastric antrum. Subsequently, radical distal gastric resection was performed, and the mass measured 6.0×4.0×3.5 cm3. Histopathological analysis revealed that the tumor cells were arranged in nests and focally formed fascicular, pseudopapillary, pseudoalveolar and rosette-like growth patterns. Osteoclast-like giant cells were also observed. Immunohistochemically, the tumor cells were positive for S-100 protein, vimentin and BCL-2, and negative for HMB45, Melan-A, CD117, CD34 and CD99. Additionally, the osteoclast-like giant cells were positive for CD68. Fluorescence in situ hybridization demonstrated EWSR1 gene rearrangement. After 10 months of follow-up, no evidence of recurrence or metastasis was observed. As GNET is currently classified differently and under various names in the literature, the information provided by this case study and review is predicted to be useful towards the accurate diagnosis, treatment and prognosis of this rare tumor type.
Collapse
Affiliation(s)
- Jie Kong
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu, Anhui 233000, P.R. China
| | - Nan Li
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu, Anhui 233000, P.R. China
| | - Shiwu Wu
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu, Anhui 233000, P.R. China
| | - Xingmei Guo
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu, Anhui 233000, P.R. China
| | - Congyou Gu
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu, Anhui 233000, P.R. China
| | - Zhenzhong Feng
- Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Bengbu Medical College, Bengbu, Anhui 233000, P.R. China
| |
Collapse
|
26
|
Yegen G, Güllüoğlu M, Mete Ö, Önder S, Kapran Y. Clear Cell Sarcoma–Like Tumor of the Gastrointestinal Tract. Int J Surg Pathol 2014; 23:61-7. [DOI: 10.1177/1066896914547046] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Clear cell sarcoma is a rare tumor classically associated with tendons and aponeuroses of lower extremities of young adults and has a distinctive histopathologic and molecular profile. It has been rarely described in other locations other than soft tissues, including the gastrointestinal tract. Herein we report a case of clear cell sarcoma of gastrointestinal tract arising in the ileum, which is rich in osteoclast-like giant cells with a review of the literature.
Collapse
Affiliation(s)
| | | | - Özgür Mete
- University of Toronto, Toronto, Ontario, Canada
| | | | | |
Collapse
|
27
|
Ishii D, Inagaki M, Shonaka T, Akabane H, Yanagida N, Shomura H, Orimo T, Aiyama T, Sato K, Nakano S. Clear cell sarcoma of the esophagus: report of a case. Clin J Gastroenterol 2014; 7:228-32. [PMID: 26183741 DOI: 10.1007/s12328-014-0479-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 03/12/2014] [Indexed: 01/19/2023]
Abstract
We report a rare case of clear cell sarcoma of the esophagus and review the literature regarding clear cell sarcomas of the gastrointestinal tract. A 57-year-old male was admitted with dysphagia during swallowing. Preoperative imaging studies, including upper gastrointestinal endoscopy and endoscopic ultrasonography, showed that the tumor was located between the mucosa and the muscularis propria of the lower esophagus. We performed subtotal esophagectomy with gastric tube reconstruction. Pathological findings of the tumor showed mixed spindle cells and oval cells. Immunohistochemical staining showed that the tumor cells were positive for S-100, vimentin and neuron-specific enolase and negative for α-smooth muscle actin, myoglobin and c-kit. Fluorescence in situ hybridization using a Ewing sarcoma breakpoint region 1 probe showed split signals in a small percentage of cells. We finally diagnosed the patient with clear cell sarcoma of the esophagus.
Collapse
Affiliation(s)
- Daisuke Ishii
- Division of Surgery, Hokkaido P.W.F.A.C Asahikawa-Kosei General Hospital, 1 Jo 24 Chome 111, 1 Jodori, Asahikawa, 078-8211, Japan,
| | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Clear cell sarcoma-like tumor of the gastrointestinal tract, presenting as a second malignancy after childhood hepatoblastoma. Case Rep Med 2014; 2014:984369. [PMID: 24715928 PMCID: PMC3970439 DOI: 10.1155/2014/984369] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 12/29/2013] [Indexed: 12/13/2022] Open
Abstract
Clear cell sarcoma-like tumor of the gastrointestinal tract (CCSLGT) is a rare malignant neoplasm arising within the wall of the small bowel, stomach, or large bowel, predominantly in children and young adults. It is an aggressive tumor with a high rate of local recurrence, metastases, and early death from disease. Histologically, it is composed of relatively monomorphic ovoid or round cells with clear to eosinophilic cytoplasm, arranged in sheets and sometimes papillary or alveolar architectures, often with CD68-positive osteoclast-like giant cells in variable numbers, and is associated with EWSR1-CREB1 gene fusions. Its pathogenesis is unknown, and histologically it can be easily confused with a variety of intra-abdominal neoplasms. We describe a case of CCSLGT with molecular characterization, presenting as an acutely obstructing small bowel mass in a 33-year-old male, which occurred as a second malignant neoplasm 20 years after treatment with surgery, radiotherapy, and cisplatin and doxorubicin chemotherapy for childhood hepatoblastoma. This gives further insight into the clinical setting of this highly aggressive neoplasm and highlights the use of radiation therapy as a possible etiologic factor.
Collapse
|
29
|
Lasithiotakis K, Protonotarios A, Lazarou V, Tzardi M, Chalkiadakis G. Clear cell sarcoma of the jejunum: a case report. World J Surg Oncol 2013; 11:17. [PMID: 23351137 PMCID: PMC3598680 DOI: 10.1186/1477-7819-11-17] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Accepted: 01/14/2013] [Indexed: 12/17/2022] Open
Abstract
Background Clear cell sarcoma (CCS), also known as malignant melanoma of soft parts, is a rare type of soft tissue sarcoma which exhibits morphological, immunohistochemical and ultrastructural similarity with malignant melanoma. It is rarely localized in the intestine and the natural history of this tumor is not yet clear. Case report A 49-year-old woman presented with diffuse abdominal colicky pain and vomitus over the previous seven days. An X-ray of the abdomen revealed obstruction of the small intestine. The patient underwent contrast enhanced abdominal computerized tomography (CT), which confirmed the obstruction at the jejunum and an associated circumferential wall thickening extending about 3 cm in length, causing concentric narrowing of the lumen. At laparotomy, a mass was recognized at the level of the jejunum in the small intestine, which caused almost complete obstruction of the lumen. At the point of obstruction, adhered loops of small intestine were found. A segmental small bowel resection was performed with 5 cm clear margins and its respective mesenteric lymph nodes. Results Histological examination of the specimen revealed a tumor (3×3×2cm) with epithelioid cell characteristics and eosinophilic or clear cytoplasm and focal translucent nuclei. Immunohistochemistry was positive for S100, epithelial membrane antigen (EMA) and synaptophysin. The tumor was pankeratin AE1/AE2, GFAP, HMB45 and MART-1/Melan-A negative. Twelve lymph nodes were retrieved and were free of neoplastic infiltration. Cytogenetic examination revealed translocation of the EWSR1 gene. The patient had an uncomplicated postoperative course and left the hospital seven days after her admission in good general condition. After 20 months of follow-up the patient remains asymptomatic without any clinical or radiological evidence of recurrence. Conclusion CCS sarcoma can be rarely localized in the jejunum. Due to its morphological similarity to malignant melanoma, cytogenetic examination is necessary for its diagnosis. Wide resection of the tumor and its respective lymph nodes was associated with a 20-month disease free survival in this patient.
Collapse
Affiliation(s)
- Konstantinos Lasithiotakis
- Department of General Surgery, University Hospital of Heraklion, Medical School of Heraklion, University of Crete, Heraklion, Greece.
| | | | | | | | | |
Collapse
|
30
|
Suárez-Vilela D, Izquierdo FM, Tojo-Ramallo S, R Riera-Velasco J, Escobar-Stein J. Malignant gastrointestinal neuroectodermal tumor showing overlapped immunophenotype with synovial sarcoma: CD99 and SOX10 antibodies are useful in differential diagnosis. Am J Surg Pathol 2013; 36:1905-8; author reply 1908. [PMID: 23154774 DOI: 10.1097/pas.0b013e31826f5b28] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
31
|
Malignant gastrointestinal neuroectodermal tumor: clinicopathologic, immunohistochemical, ultrastructural, and molecular analysis of 16 cases with a reappraisal of clear cell sarcoma-like tumors of the gastrointestinal tract. Am J Surg Pathol 2012; 36:857-68. [PMID: 22592145 DOI: 10.1097/pas.0b013e31824644ac] [Citation(s) in RCA: 137] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The clinical, histologic, immunophenotypic, ultrastructural, and molecular features of a distinctive gastrointestinal tumor are described. Sixteen patients, 8 women and 8 men aged 17 to 77 years (mean age, 42 y; 63% less than 40 y) presented with abdominal pain, intestinal obstruction, and an abdominal mass. Mean tumor size was 5.2 cm (range, 2.4 to 15.0 cm). The tumors arose in the small bowel (10), stomach (4), and colon (2) and were histologically characterized by a sheet-like or nested population of epithelioid or oval-to-spindle cells with small nucleoli and scattered mitoses. Five cases showed focal clearing of the cytoplasm. Scattered osteoclast-type multinucleated giant cells were present in 8 cases. The tumor cells were positive for S-100 protein, SOX10, and vimentin in 100% of cases, for CD56 in 70%, for synaptophysin in 56%, for NB84 in 50%, for NSE in 45%, and for neurofilament protein in 14% of cases. All cases tested were negative for specific melanocytic, gastrointestinal stromal tumors, epithelial, and myoid markers. Ultrastructural examination of 5 cases showed features of primitive neuroectodermal cells with clear secretory vesicles, dense-core granules, occasional gap junctions, and no evidence of melanogenesis. EWSR1 gene rearrangement was assessed by fluorescence in situ hybridization in 14 cases. Twelve cases (86%) showed split EWSR1 signal consistent with a chromosomal translocation involving EWSR1. One case showed extra intact signals, indicating that the nuclei possessed either extra copies of the EWSR1 gene or chromosome 22 polysomy. Only 1 case showed no involvement of the EWSR1 gene. Six cases demonstrated rearrangement of the partner fusion gene ATF1 (46%), and 3 showed rearrangement of CREB1 (23%); 2 cases lacked rearrangement of either partner gene. Clinical follow-up was available in 12 patients and ranged from 1.5 to 106 months. Six patients died of their tumors (mean survival, 32 mo; 83% less than 24 mo). At last follow-up, 4 patients were alive with regional, lymph node, and liver metastases, and 2 patients were alive with no evidence of disease. The tumor described here is an aggressive form of neuroectodermal tumor that should be separated from other primitive epithelioid and spindle cell tumors of the gastrointestinal tract. The distinctive ultrastructural features and absence of melanocytic differentiation serve to separate them from soft tissue clear cell sarcomas involving the gastrointestinal tract. The designation "malignant gastrointestinal neuroectodermal tumor" is proposed for this tumor type.
Collapse
|
32
|
D'Amico FE, Ruffolo C, Romeo S, Massani M, Dei Tos AP, Bassi N. Clear cell sarcoma of the ileum: report of a case and review of the literature. Int J Surg Pathol 2011; 20:401-6. [PMID: 22207412 DOI: 10.1177/1066896911428073] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Clear cell sarcoma of the gastrointestinal tract (CCS-GI) is an extremely rare and aggressive tumor, which often mimics other neoplastic processes. Because of this feature, its real incidence may have been underestimated, especially in the past when genetic tests were less available than nowadays. To date, less then 30 cases have been described in the literature on the GI tract. CASE PRESENTATION We report the case of a 69-year-old woman who presented with active rectal bleeding. After a negative colonoscopy, the patient underwent a video-capsule endoscopy. The latter detected an ileal mass that was surgically resected. The microscopic appearance was consistent with a malignant mesenchymal neoplasm; immunohistochemistry was positive for S100 protein, CD56, and INI1. Fluorescence in situ hybridization showed a translocation involving the EWSR1 (Ewing sarcoma 1) gene region. All these findings were consistent with a CCS-GI. CONCLUSION Herein we present a case of CCS-GI, discuss its clinical and pathological features, and review the literature on the subject.
Collapse
Affiliation(s)
- Francesco E D'Amico
- II Department of Surgery (IV unit), Regional Hospital Ca' Foncello, Treviso, Italy.
| | | | | | | | | | | |
Collapse
|
33
|
Shenjere P, Salman WD, Singh M, Mangham DC, Williams A, Eyden BP, Howard N, Knight B, Banerjee SS. Intra-abdominal clear-cell sarcoma: a report of 3 cases, including 1 case with unusual morphological features, and review of the literature. Int J Surg Pathol 2011; 20:378-85. [PMID: 22084426 DOI: 10.1177/1066896911425485] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Clear-cell sarcoma (CCS) is a soft-tissue neoplasm that morphologically resembles cutaneous malignant melanoma but has a distinct molecular profile. Gastrointestinal and intra-abdominal CCSs are very rare. Here, the authors present 3 cases of intra-abdominal CCS and review the literature. Of these cases, 2 involved the small bowel, and 1 involved the peritoneum. Cases 1 and 3 had the characteristic CCS morphology, but case 2 was morphologically unusual and therefore difficult to diagnose. It had relatively small cells with less prominence of clear cells; many pseudoglandular structures were also present. It also showed aberrant expression of epithelial membrane antigen (EMA). The other 2 cases also involved some diagnostic uncertainty and were therefore referred to specialized centers. The authors wish to emphasize the importance of molecular studies in making a conclusive diagnosis of intra-abdominal CCS.
Collapse
Affiliation(s)
- Patrick Shenjere
- Department of Histopathology, The Christie NHS Foundation Trust, Manchester, UK.
| | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Bono F, Testi MA, Rosai J. Desmoplastic Small Cell Tumor With Bizarre Giant Nuclei. Int J Surg Pathol 2011; 19:843-6. [DOI: 10.1177/1066896911400738] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A case is reported of an intra-abdominal desmoplastic small cell tumor featuring giant bizarre nuclei, an event not previously recorded in this entity to the best of the authors’ knowledge. The diagnosis was confirmed by immunohistochemistry and molecular genetics. A list is provided of the many other conditions in which this morphologically spectacular but clinically inconsequential nuclear change has been recorded.
Collapse
Affiliation(s)
| | | | - Juan Rosai
- Centro Diagnostico Italiano, Milan, Italy
| |
Collapse
|
35
|
Yu Z, Parham DM. Paediatric soft tissue tumours: from histology to molecular diagnosis. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.mpdhp.2009.08.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
36
|
Abstract
Clear cell sarcoma (CCS) is a high grade soft tissue sarcoma with a distinct molecular profile. Gastrointestinal CCS is very rare and most reported cases are in adults. We describe a 10-year-old female with a 4-month history of anemia who later developed fever, weight loss and abdominal pain. She was subsequently found to have a large infiltrative gastric mass. A diagnosis of CCS was confirmed by molecular and cytogenetic studies. This case illustrates the necessity of a multimodal approach, particularly the use of molecular studies, in the diagnostic evaluation of rare tumors presenting in unusual sites.
Collapse
Affiliation(s)
- Joanne P Lagmay
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio, USA.
| | | | | | | |
Collapse
|
37
|
Do IG, Keun Park C, Kim KM. Gastrointestinal stromal tumour with osteoclast-like giant cells and aneurysmal bone cyst-like features. Pathology 2009; 41:396-7. [DOI: 10.1080/00313020902886977] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
38
|
Gastrointestinal melanoma or clear cell sarcoma? Molecular evaluation of 7 cases previously diagnosed as malignant melanoma. Am J Surg Pathol 2008; 32:858-66. [PMID: 18408594 DOI: 10.1097/pas.0b013e31815b8288] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Clear cell sarcoma (CCS) is a rare tumor classically associated with the tendons and aponeuroses of distal extremities of young adults. CCS and malignant melanoma (MM) share immunohistochemical profiles and ultrastructural features, but classic CCS has characteristic morphology with low mitotic activity and minimal pleomorphism. Occasional cases show pleomorphism, high mitotic index, and/or melanin pigmentation, making CCS indistinguishable from MM based on morphology. However, CCS is genetically distinct owing to its consistent association with a t(12;22)(q13;q12) chromosomal translocation, leading to the formation of the EWS/ATF1 fusion transcript. This translocation has never been documented in cutaneous melanoma, and thus is regarded as specific for CCS. Recent evidence suggests that primary "malignant melanomas" in unusual anatomic sites, most notably the gastrointestinal (GI) tract, may be CCS. This is supported by 11 cases of primary GI CCS with the t(12;22) translocation. We used reverse-transcription polymerase chain reaction and fluorescence in situ hybridization to examine whether a proportion of cases diagnosed as MM of the GI tract in patients without a history of cutaneous MM actually represent primary GI CCS. In total, we examined 7 cases: Four with no prior history of MM, 2 with histories of cutaneous MM, and 1 with an anal MM. All 4 cases for which there was no history of cutaneous/mucosal MM harbored the EWS/ATF1 fusion transcript. We report the largest series of GI CCS and have shown that molecular studies may be warranted in cases that otherwise seem to represent MM of unusual primary locations.
Collapse
|
39
|
Abdulkader I, Cameselle-Teijeiro J, de Alava E, Ruiz-Ponte C, Used-Aznar MM, Forteza J. Intestinal clear cell sarcoma with melanocytic differentiation and EWS [corrected] rearrangement: report of a case. Int J Surg Pathol 2008; 16:189-93. [PMID: 18417679 DOI: 10.1177/1066896907306841] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A clear cell sarcoma-like tumor with osteoclast-like giant cells of the gastrointestinal tract without immunoexpression of CD117 was recently proposed as a new tumor entity. In this article, a case of a 37-year-old man with a neoplasm of the jejunum composed of polygonal cells with clear to eosinophilic cytoplasm forming nests and fascicles is reported. Giant cells were not identified. Immunohistochemically, the tumor cells expressed strongly S100 protein, human melanoma black 45, platelet-derived growth factor receptor alpha, B-cell lymphoma 2, p53, and to a lesser extent vimentin, neuron-specific enolase, and epithelial membrane antigen. Mindbomb homolog-1 index was 35%. Immunoreactivity for CD34 and CD117 was negative. The fluorescence in situ hybridization analysis showed a translocation involving chromosome 22q12, the diagnostic hallmark of clear cell sarcoma of soft tissues. This case indicates a close histogenetic relationship with the recently reported clear cell sarcoma with osteoclast-like giant cells of the gastrointestinal tract, as well as with the clear cell sarcoma of soft tissues.
Collapse
Affiliation(s)
- Ihab Abdulkader
- Department of Pathology, Hospital Clínico Universitario, SERGAS, University of Santiago de Compostela, Galicia, Spain.
| | | | | | | | | | | |
Collapse
|
40
|
Kenney B, Dotto J, Homer R, Shafi N, Davydova L. Primary malignant melanoma of the transverse colon: report of a case and review of the literature. Int J Surg Pathol 2007; 15:401-7. [PMID: 17913951 DOI: 10.1177/1066896907302370] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Gastrointestinal involvement by malignant melanoma is predominantly a metastatic phenomenon. Although primary malignant melanoma of the gastrointestinal tract has been documented in the esophagus, stomach, small bowel, and anorectum, the incidence of primary melanoma of the colon is rare and remains controversial in most cases. We present a case of solitary malignant melanoma of the transverse colon occurring in a 64-year-old African American male patient. Complete dermatologic and ophthalmologic examinations revealed no evidence of a cutaneous or an ocular primary lesion. Microscopic examination of the resection specimen revealed malignant melanoma, which was confirmed by immunohistochemical positivity for S100 and melan-A. We believe that this tumor represents a primary colonic malignant melanoma.
Collapse
Affiliation(s)
- Barton Kenney
- Department of Pathology, Yale University School of Medicine, 20 York Street, New Haven, CT 06520-8023, USA.
| | | | | | | | | |
Collapse
|
41
|
Wardelmann E, Büttner R, Merkelbach-Bruse S, Schildhaus HU. Mutation analysis of gastrointestinal stromal tumors: increasing significance for risk assessment and effective targeted therapy. Virchows Arch 2007; 451:743-9. [PMID: 17701051 DOI: 10.1007/s00428-007-0473-9] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2007] [Revised: 07/06/2007] [Accepted: 07/06/2007] [Indexed: 11/26/2022]
Abstract
Molecular characterization of gastrointestinal stromal tumors (GISTs) plays an increasing role not only for the patient's prognosis but also for treatment options and in the context of resistance to therapy. Several mutational subtypes in KIT or platelet-derived growth factor receptor-alpha (PDGFRalpha) have been identified to be correlated with a different clinical behavior of GISTs. In KIT exon 11, deletions in the proximal part are associated with a high metastatic risk, whereas duplications in the distal part lead to a less aggressive phenotype. GISTs of the small bowel with a duplication in KIT exon 9 are often high risk tumors. In contrast, PDGFRalpha exon 18 mutated GISTs tend to have a low malignant potential. The authors suggest to include these molecular data together with classical parameters such as mitotic count and tumor size into the risk assessment of GISTs. The first choice for treatment of GISTs is still the surgical resection. In advanced tumors, which cannot be R0 resected, the neoadjuvant treatment with the tyrosine kinase inhibitor imatinib is now well established. Furthermore, an adjuvant treatment of locally R0-resected intermediate and high risk tumors is evaluated in several international clinical trials. For metastatic disease, treatment with imatinib is still the first option, but with new upcoming substances, the molecular characterization of GISTs may become mandatory. Very recently, it has been shown that sunitinib may be especially effective in GISTs with KIT exon 9 mutation, whereas these tumors show only an intermediate response to imatinib. A European Organisation for Research and Treatment of Cancer clinical trial randomizing patients according to their mutational status is under preparation. Secondary resistance to imatinib treatment is increasing, at least partly due to secondary mutations in the tyrosine kinase domain of the KIT receptor. Once a lesion has been shown to carry such a mutation, the local excision may be useful, mean while still responding metastases are further controlled by continuing imatinib. Taken together, the molecular characterization of GISTs turns out to play a central role before and during the treatment with tyrosine kinase inhibitors, which have improved the treatment of GIST patients dramatically.
Collapse
Affiliation(s)
- Eva Wardelmann
- Department of Pathology, University of Bonn Medical School, Sigmund-Freud-Strasse 25, 53127 Bonn, Germany.
| | | | | | | |
Collapse
|
42
|
Comin CE, Novelli L, Tornaboni D, Messerini L. Clear cell sarcoma of the ileum: report of a case and review of literature. Virchows Arch 2007; 451:839-45. [PMID: 17636326 DOI: 10.1007/s00428-007-0454-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2007] [Accepted: 03/06/2007] [Indexed: 12/23/2022]
Abstract
Clear cell sarcoma (CCS) is a high grade soft tissue sarcoma with a distinct molecular profile and with morphological features resembling those of melanoma. CCS has been rarely described in other locations other than the soft tissues, including the gastrointestinal tract. In this study, we report a case of CCS arising in the ileum of a 31-year-old woman. Histologically, the tumor involved the entire thickness of the intestinal wall. Tumor cells were polygonal or fusiform, with clear or eosinophilic cytoplasm, arranged in a uniform nested to fascicular growth pattern. Immunohistochemical studies revealed strong positivity for vimentin and S-100 protein. HMB-45, Melan-A, tyrosinase, cytokeratins, EMA, smooth muscle actin, CD34, CD31, CD117, CD99, synaptophysin, chromogranin A, CD56, and NSE were negative. Fluorescence in situ hybridization analysis demonstrated the presence of a t(12;22)(q13;q12) translocation, the diagnostic hallmark of CCS of soft parts. The present case, together with a detailed review of the literature on this topic, demonstrates that the gastrointestinal tract is a possible site of CCS of soft tissues and that making a reliable diagnosis of this tumor requires cytogenetic or molecular diagnostic investigations.
Collapse
Affiliation(s)
- Camilla E Comin
- Dipartimento di Patologia Umana ed Oncologia, Università degli Studi di Firenze, V.le Morgagni, 85, 50134 Firenze, Italy.
| | | | | | | |
Collapse
|
43
|
Kirsch R, Gao ZH, Riddell R. Gastrointestinal stromal tumors: diagnostic challenges and practical approach to differential diagnosis. Adv Anat Pathol 2007; 14:261-85. [PMID: 17592256 DOI: 10.1097/pap.0b013e3180ca826a] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Over the last decade, gastrointestinal stromal tumors (GISTs) have evolved from histogenetically obscure gastrointestinal mesenchymal tumors to well-defined tumors with distinctive clinical, morphologic, ultrastructural, histogenetic, and molecular characteristics, for which targeted therapy is available. This is largely attributable to the discovery of CD117 overexpression and activating mutations in c-kit or platelet-derived growth factor alpha genes in most of GISTs. The availability of specific diagnostic tests and targeted therapy for GISTs has led to an increased awareness of these tumors. At the same time, the list of potential GIST mimics has lengthened considerably and it has become increasingly important that GISTs be distinguished from their mimics because correct diagnosis has implications for both treatment and prognosis. The purpose of this review is to provide an update of the expanding differential diagnosis of GISTS, to draw attention to unusual GIST variants, to provide a practical approach the differential diagnosis of GISTs and to highlight some of the challenges faced by pathologists in resolving this differential diagnosis.
Collapse
Affiliation(s)
- Richard Kirsch
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada.
| | | | | |
Collapse
|
44
|
Antonescu CR, Nafa K, Segal NH, Dal Cin P, Ladanyi M. EWS-CREB1: a recurrent variant fusion in clear cell sarcoma--association with gastrointestinal location and absence of melanocytic differentiation. Clin Cancer Res 2006; 12:5356-62. [PMID: 17000668 DOI: 10.1158/1078-0432.ccr-05-2811] [Citation(s) in RCA: 262] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
PURPOSE Clear cell sarcoma (CCS) usually arises in the lower extremities of young adults and is typically associated with a t(12;22) translocation resulting in the fusion of EWS (EWSR1) with ATF1, a gene encoding a member of the cyclic AMP-responsive element binding protein (CREB) family of transcription factors. CCS arising in the gastrointestinal tract is rare and its pathologic and molecular features are not well defined. EXPERIMENTAL DESIGN We report a novel variant fusion of EWS to CREB1, a gene at 2q32 encoding another CREB family member highly related to ATF1, detected in three women with gastrointestinal CCS. All three cases contained an identical EWS-CREB1 fusion transcript that was shown by reverse transcription-PCR. In two of the cases tested, EWS gene rearrangement was also confirmed by fluorescence in situ hybridization and the EWS-CREB1 genomic junction fragments were isolated by long-range DNA PCR. RESULTS Morphologically, all three tumors lacked melanin pigmentation. By immunohistochemistry, there was a strong and diffuse S100 protein reactivity, whereas all melanocytic markers were negative. Ultrastructurally, two of the cases lacked melanosomes. The melanocyte-specific transcript of MITF was absent in two cases, and only weakly expressed in the third case. The Affymetrix gene expression data available in one case showed lower expression of the melanocytic genes MITF, TYR, and TYRP1, compared with four EWS-ATF1-positive CCSs of non-gastrointestinal origin. CONCLUSIONS EWS-CREB1 may define a novel subset of CCS that occurs preferentially in the gastrointestinal tract and shows little or no melanocytic differentiation. Thus, evidence of melanocytic lineage or differentiation is not a necessary feature of sarcomas with gene fusions involving CREB family members.
Collapse
Affiliation(s)
- Cristina R Antonescu
- Department of Pathology, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, and Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | | | | | | | | |
Collapse
|
45
|
Abstract
Primary malignant melanoma originating in the digestive tract is extremely rare. A case of primary malignant melanoma in the descending colon is described. The tumor was an elevated mass with surface necrosis. Histologically, tumor cells were arranged with compact nests surrounded by fibrous stroma. The tumor cells had pleomorphic nuclei and rich cytoplasm. In some areas, cells of signet ring-like appearance were found. An immunohistochemical examination showed that most of the tumor cells were positive for S-100 protein, HMB-45, melan-A, vimentin and CD38. Ultrastructural examination confirmed some premelanosomes. EWS-ATF-1 fusion transcript, which is usually detected in clear cell sarcoma, was not demonstrated on reverse transcriptase-polymerase chain reaction. Because there was no evidence of either cutaneous or ocular primary melanoma, the tumor was thus diagnosed as primary colonic malignant melanoma. The patient has remained free of recurrent disease for 3 years after a surgical resection. Colonic malignant melanoma must be differentiated from other intestinal tumor, and the possibility of metastasis from another more common primary site must be ruled out.
Collapse
Affiliation(s)
- Daisuke Mori
- Department of Pathology and Biodefense, Faculty of Medicine, Saga University, Saga, Japan.
| | | | | | | | | | | |
Collapse
|
46
|
Friedrichs N, Kriegl L, Poremba C, Schaefer KL, Gabbert HE, Shimomura A, Paggen E, Merkelbach-Bruse S, Buettner R. Pitfalls in the detection of t(11;22) translocation by fluorescence in situ hybridization and RT-PCR: a single-blinded study. ACTA ACUST UNITED AC 2006; 15:83-9. [PMID: 16778588 DOI: 10.1097/00019606-200606000-00004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The t(11;22) translocation is a diagnostic hallmark of various small round-cell tumors. This study correlates the performance of fluorescence in situ hybridization (FISH) and reverse transcription polymerase chain reaction (RT-PCR) in the detection of this translocation analyzing paraffin-embedded tissue specimens. As negative control samples, 10 cases of normal colon mucosa and 10 cases of colon carcinoma tissue were analyzed by FISH to determine a valid cutoff value for the diagnosis of a t(11;22) translocation. The mean number of false-positive nuclei differed significantly between disomic and polysomic control group cases (P=0.002). Therefore, the cutoff value was determined considering the pitfall polysomy. The analysis group consisted of 20 cases from the University of Düsseldorf and 10 cases from the University of Bonn. These cases were analyzed using PCR (Düsseldorf) and FISH (Bonn) using a single-blinded approach. Twenty-two cases (73.3%) were concordant in both methods. Five cases (16.7%) were discrepant, showing a positive result in FISH whereas PCR was negative. Three cases (10.0%) were analyzed by FISH, and PCR failed for nonoptimized tissue preparation. In conclusion, the detection of t(11;22) translocation is critically dependent on a thoroughly defined cutoff value for FISH and on appropriate tissue preparation for both methods. We recommend FISH as a sensitive screening tool in the detection of t(11;22) followed by subsequent PCR amplification of the specific chimeric transcript.
Collapse
MESH Headings
- Adult
- Aged
- Base Sequence
- Carcinoma, Small Cell/diagnosis
- Carcinoma, Small Cell/genetics
- Case-Control Studies
- Chromosomes, Human, Pair 11/genetics
- Chromosomes, Human, Pair 22/genetics
- Colonic Neoplasms/diagnosis
- Colonic Neoplasms/genetics
- DNA Primers/genetics
- Humans
- In Situ Hybridization, Fluorescence/methods
- In Situ Hybridization, Fluorescence/statistics & numerical data
- Predictive Value of Tests
- Reverse Transcriptase Polymerase Chain Reaction/methods
- Reverse Transcriptase Polymerase Chain Reaction/statistics & numerical data
- Sarcoma, Small Cell/diagnosis
- Sarcoma, Small Cell/genetics
- Single-Blind Method
- Translocation, Genetic
Collapse
Affiliation(s)
- Nicolaus Friedrichs
- Institute of Pathology, University of Bonn Medical School, Sigmund-Freud-Str. 25, D-53127 Bonn, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|