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Noguchi T, Suzuki T, Shibata Y, Koizumi M, Osaka K, Kishida T. Retroperitoneal low-grade fibromyxoid sarcoma. IJU Case Rep 2024; 7:255-258. [PMID: 38686065 PMCID: PMC11056262 DOI: 10.1002/iju5.12718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Accepted: 02/21/2024] [Indexed: 05/02/2024] Open
Abstract
Introduction Low-grade fibromyxoid sarcoma is an uncommon deep-seated soft-tissue sarcoma that occurs rarely in young adults and children. Although surgical resection provides a long-term prognosis, late local recurrence and metastasis may occur. Case presentation A 44-year-old woman with no prior medical history presented with breathing and abdominal discomfort. Contrast-enhanced computed tomography scan revealed a retroperitoneal tumor protruding into the thoracic cavity and pleural effusion on the left side. Tumor biopsy revealed sarcoma. We performed complete resection of the tumor along with part of the diaphragm and replaced the diaphragm with a prosthetic patch. Histopathologic findings indicated low-grade fibromyxoid sarcoma. The patient experienced no postoperative complications and received no adjuvant therapy. Furthermore, she survived 4 years after surgery without recurrence. Conclusion Complete surgical resection is effective for low-grade fibromyxoid sarcoma; therefore, it is important to plan appropriately for complete resection when biopsy reveals malignant findings.
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Affiliation(s)
- Takeaki Noguchi
- Department of urologyKanagawa Cancer CenterYokohamaKanagawaJapan
| | - Takahisa Suzuki
- Department of urologyKanagawa Cancer CenterYokohamaKanagawaJapan
| | - Yosuke Shibata
- Department of urologyKanagawa Cancer CenterYokohamaKanagawaJapan
| | | | - Kimito Osaka
- Department of urologyKanagawa Cancer CenterYokohamaKanagawaJapan
| | - Takeshi Kishida
- Department of urologyKanagawa Cancer CenterYokohamaKanagawaJapan
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2
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He X, Jing W, He X, Chen M, Zhang H. Case report: Primary pleural low-grade fibromyxoid sarcoma in a 4-year-old boy with molecular confirmation. Front Oncol 2023; 13:1269078. [PMID: 38179169 PMCID: PMC10765539 DOI: 10.3389/fonc.2023.1269078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 11/23/2023] [Indexed: 01/06/2024] Open
Abstract
Low-grade fibromyxoid sarcoma (LGFMS) is a rare malignant fibroblastic tumor, principally affecting the deep tissues of the proximal trunk and extremities in young adults. However, primary pleural LGFMS is extremely rare, and only three cases have been reported in the previous English literature without genetic confirmation. Furthermore, the historical pleural LGFMS cases were all adults, and the primary pleural LGFMS in children has never been reported to date. Here, we presented a primary pleural LGFMS in a 4-year-old boy with detailed clinical, pathological, and molecular results. Histologically, the current tumor showed typical alternating collagenous and myxoid areas, containing spindled or oval tumor cells arranged in a whorled and short fascicular pattern. In some areas, the tumor cells exhibited moderate atypia, and mitotic figures were identified but without the identification of giant collagen rosettes. Immunohistochemically, all the neoplastic cells showed strong and diffuse positivity for MUC4. Genetically, FUS gene rearrangement was revealed by fluorescence in-situ hybridization (FISH), and subsequently, next-generation sequencing (NGS) and polymerase chain reaction (PCR) further demonstrated the FUS::CREB3L2 fusion transcript. To the best of our knowledge, this is the first case of primary pleural LGFMS with the identification of FUS gene rearrangement and FUS::CREB3L2 fusion in a 4-year-old child. Our study expands the age range of pleural LGFMS and highlights the combination of morphological, immunohistochemical, and molecular analyses in such challenging cases.
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Affiliation(s)
| | | | | | | | - Hongying Zhang
- Department of Pathology, West China Hospital, Sichuan University, Chengdu, China
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3
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Apte SS, Mor E, Mitchell C, Gyorki DE. Practical Management of Adult Ultra-Rare Primary Retroperitoneal Soft Tissue Sarcoma: A Focus on Perivascular Epithelioid Tumours and Extraosseous Ewing Sarcoma. Curr Oncol 2023; 30:5953-5972. [PMID: 37504306 PMCID: PMC10377910 DOI: 10.3390/curroncol30070445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 06/16/2023] [Accepted: 06/20/2023] [Indexed: 07/29/2023] Open
Abstract
With the exception of well-differentiated liposarcoma, dedifferentiated liposarcoma, leiomyosarcoma, solitary fibrous tumour, malignant peripheral nerve sheath tumour, and undifferentiated pleomorphic sarcoma, the majority of the ≈70 histologic subtypes of retroperitoneal sarcoma are defined as 'ultra-rare' sarcomas, with an incidence of ≤1-5/1,000,000 persons/year. For most of these ultra-rare RPS subtypes, diagnosis and treatment follows international guidelines for the management of more common RPS histologies, with en bloc surgical resection as the mainstay of curative treatment, and enrolment in clinical trials where possible. Because the treatment of RPS is heavily driven by histology, the surgeon must be familiar with specific issues related to the diagnosis and management of ultra-rare sarcoma subtypes. Expert radiological and surgeon reviews are required to differentiate similarly presenting tumours where surgery can be avoided (e.g., angiomyolipoma), or where upfront systemic therapy is indicated (e.g., extraosseous Ewing's sarcoma). Thus, the management of all retroperitoneal sarcomas should occur at a sarcoma referral centre, with a multidisciplinary team of experts dedicated to the surgical and medical management of these rare tumours. In this focused review, we highlight how diagnosis and management of the ultra-rare primary RPS histologies of malignant perivascular epithelioid cell tumour (PEComa), extraosseous Ewing sarcoma (EES), extraosseous osteosarcoma (EOS), and rhabdomyosarcoma (RMS) critically diverge from the management of more common RPS subtypes.
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Affiliation(s)
- Sameer S Apte
- Division of Cancer Surgery, Peter MacCallum Cancer Centre, Melbourne, VIC 3000, Australia
- Division of General Surgery, The Ottawa Hospital, Ottawa, ON K1H 8L6, Canada
| | - Eyal Mor
- Division of Cancer Surgery, Peter MacCallum Cancer Centre, Melbourne, VIC 3000, Australia
| | - Catherine Mitchell
- Division of Pathology, Peter MacCallum Cancer Centre, Melbourne, VIC 3000, Australia
| | - David E Gyorki
- Division of Cancer Surgery, Peter MacCallum Cancer Centre, Melbourne, VIC 3000, Australia
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4
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Muñoz-Leija MA, Alemán-Jiménez MC, Plata-Álvarez H, Menes-Ramírez G. Low-Grade Fibromyxoid Sarcoma of the Abdominal Wall: A Clinical Case Report. Cureus 2023; 15:e35699. [PMID: 37012939 PMCID: PMC10066792 DOI: 10.7759/cureus.35699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/02/2023] [Indexed: 03/06/2023] Open
Abstract
Low-grade fibromyxoid sarcoma (LGFMS) is a soft tissue neoplasm that occurs preferentially in young, male adults as a slowly growing, asymptomatic mass. According to current literature, the most common anatomical sites where it occurs are the trunk and lower extremities, especially the thigh, perineum, and groin. The risk factors are still unknown. Surgical intervention (simple resection and wide excision) is nowadays considered the best treatment option; however, patients require a long follow-up due to the high recurrence and metastasis rates. We present a low-grade fibromyxoid sarcoma case located in the abdominal wall of a female Hispanic patient.
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Porrino J, Al-Dasuqi K, Irshaid L, Wang A, Kani K, Haims A, Maloney E. Update of pediatric soft tissue tumors with review of conventional MRI appearance-part 1: tumor-like lesions, adipocytic tumors, fibroblastic and myofibroblastic tumors, and perivascular tumors. Skeletal Radiol 2022; 51:477-504. [PMID: 34191084 DOI: 10.1007/s00256-021-03836-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 05/22/2021] [Accepted: 06/02/2021] [Indexed: 02/02/2023]
Abstract
There are numerous soft tissue tumors and tumor-like conditions in the pediatric population. Magnetic resonance imaging is the most useful modality for imaging these lesions. Although certain soft tissue lesions exhibit magnetic resonance features characteristic of a specific diagnosis, most lesions are indeterminate, and a biopsy is necessary for diagnosis. We provide a detailed update of soft tissue tumors and tumor-like conditions that occur in the pediatric population, emphasizing each lesion's conventional magnetic resonance imaging appearance, using the recently released 5th edition of the World Health Organization Classification of Soft Tissue and Bone Tumors as a guide. In part one of this review, pediatric tumor-like lesions, adipocytic tumors, fibroblastic and myofibroblastic tumors, and perivascular tumors are discussed. In part two, vascular lesions, fibrohistiocytic tumors, muscle tumors, peripheral nerve sheath tumors, tumors of uncertain differentiation, and undifferentiated small round cell sarcomas are reviewed. Per the convention of the WHO, these lesions involve the connective, subcutaneous, and other non-parenchymatous-organ soft tissues, as well as the peripheral and autonomic nervous system.
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Affiliation(s)
- Jack Porrino
- Yale Radiology and Biomedical Imaging, 330 Cedar Street, New Haven, CT, 06520, USA.
| | - Khalid Al-Dasuqi
- Yale Radiology and Biomedical Imaging, 330 Cedar Street, New Haven, CT, 06520, USA
| | - Lina Irshaid
- Yale School of Medicine Department of Pathology, 333 Cedar Street, New Haven, CT, 06520, USA
| | - Annie Wang
- Yale Radiology and Biomedical Imaging, 330 Cedar Street, New Haven, CT, 06520, USA
| | - Kimia Kani
- Department of Radiology, University of Maryland Medical Center, 22 S Greene St, Baltimore, MD, 21201, USA
| | - Andrew Haims
- Yale Radiology and Biomedical Imaging, 330 Cedar Street, New Haven, CT, 06520, USA
| | - Ezekiel Maloney
- Seattle Children's Hospital, 4800 Sand Point Way NE, Seattle, WA, 98105, USA
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7
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Ma TS, Zhou L, Zhou Q, He XL, Zhao M. Soft tissue perineurioma involving the kidney: a report of two cases with an emphasis on differential diagnosis. Diagn Pathol 2021; 16:87. [PMID: 34592995 PMCID: PMC8482618 DOI: 10.1186/s13000-021-01149-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 09/20/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Soft tissue perineurioma of the kidney is rare, with only a few reported cases. We report two additional cases with histologic, immunohistochemical and genetic analyses. CASE PRESENTATION Both tumors were from adults (1 female aged 49 years and 1 male aged 42 years) and grossly had maximum diameters of 6.5 and 10 cm, respectively. The tumors were overall well circumscribed but unencapsulated, with focally entrapped benign native renal tubules in one case; both tumors seemed to arise in the capsular areas. The tumors had histologic and immunohistochemical profiles consistent with soft tissue perineurioma. Fluorescence in situ hybridization analyses demonstrated that the tumors were negative for amplification of MDM2 and rearrangements of ESWR1, FUS, and KMT2A. Targeted next-generation sequencing revealed a low tumor mutation burden and likely pathogenic mutations (CYP2B6 and FLT1 mutations for 1 each). Follow-up data were available for both patients; neither had tumor recurrence or metastasis. CONCLUSIONS In conclusion, renal perineurioma is rare, usually arises in the capsular areas, and is cured by resection. Low-grade dedifferentiated liposarcoma and low-grade fibromyxoid sarcoma as well as other spindle cell lesions should be considered in the differential diagnosis.
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Affiliation(s)
- Tian-Shi Ma
- Department of Pathology, Laboratory Medicine Center, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, 310014, Hangzhou, Zhejiang, China
| | - Ling Zhou
- Department of Pathology, People's Hospital of Lichuan, 445499, Lichuan, Hubei, China
| | - Quan Zhou
- Department of Pathology, Jiaxing Second Hospital, 314099, Jiaxing, Zhejiang, China
| | - Xiang-Lei He
- Department of Pathology, Laboratory Medicine Center, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, 310014, Hangzhou, Zhejiang, China
| | - Ming Zhao
- Department of Pathology, Laboratory Medicine Center, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, 310014, Hangzhou, Zhejiang, China. .,Department of Pathology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, 158 Shangtang Road, 310014, Hangzhou, Zhejiang, China.
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8
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Gjorgova Gjeorgjievski S, Fritchie K, Thangaiah JJ, Folpe AL, Din NU. Head and Neck Low-Grade Fibromyxoid Sarcoma: A Clinicopathologic Study of 15 Cases. Head Neck Pathol 2021; 16:434-443. [PMID: 34559373 PMCID: PMC9187798 DOI: 10.1007/s12105-021-01380-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 09/09/2021] [Indexed: 10/20/2022]
Abstract
Low-grade fibromyxoid sarcoma (LGFMS) is an uncommon mesenchymal tumor usually arising in the lower extremities and trunk. Only rare examples in the head and neck region have been reported. Fifteen cases of head and neck LGFMS were retrieved. MUC4 was performed on all cases. Results for smooth muscle actins, β-catenin, desmin, S100 protein, Epithelial membrane antigen (EMA) and STAT6 immunohistochemistry, as well as FUS rearrangement status, were recorded when available. Sites included neck (8), supraclavicular region (4) and orbit (1), parapharyngeal space (1) and lower lip (1). The age of the patients ranged from 3 to 97 years (median, 26 years). Tumors displayed classical morphologic features of LGFMS, as described. All cases (15/15) were positive for MUC4, and all cases tested (4/4) harbored FUS rearrangement. Variable positivity for EMA was identified in one case. Follow-up was available in 11 patients, ranging from 2 to 240 months (mean 71.4 months; median, 44 months). Three tumors recurred locally; none metastasized. In conclusion, although distinctly uncommon, LGFMS may arise in the head and neck region and should be distinguished from other more common spindle cell tumors in these locations. The morphologic, immunohistochemical and molecular genetic features of head/neck LGFMS are identical to those occurring elsewhere. The long-term metastatic risk of LGFMS in these locations remains to be fully elucidated.
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Affiliation(s)
| | - Karen Fritchie
- grid.239578.20000 0001 0675 4725Department of Anatomic Pathology, Cleveland Clinic, Cleveland, OH USA
| | - Judith Jebastin Thangaiah
- grid.66875.3a0000 0004 0459 167XDepartment of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN USA
| | - Andrew L. Folpe
- grid.66875.3a0000 0004 0459 167XDepartment of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN USA
| | - Nasir Ud Din
- grid.411190.c0000 0004 0606 972XDepartment of Pathology and Laboratory Medicine, Aga Khan University Hospital, Karachi, Pakistan
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9
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Dugalic V, Ignjatovic II, Kovac JD, Ilic N, Sopta J, Ostojic SR, Vasin D, Bogdanovic MD, Dumic I, Milovanovic T. Low-grade fibromyxoid sarcoma of the liver: A case report. World J Clin Cases 2021; 9:175-182. [PMID: 33511182 PMCID: PMC7809678 DOI: 10.12998/wjcc.v9.i1.175] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 09/15/2020] [Accepted: 11/21/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Low grade fibromyxoid sarcoma (LGFMS) is a rare and benign mesenchymal tumor with indolent course, most commonly found in young or middle-aged men. The majority of the LGFMSs are located in the trunk and deep soft tissue of the lower extremities. They appear as well circumscribed, although not encapsulated, which often leads to incomplete surgical resection. Despite their seemingly benign appearance, these tumors have aggressive behavior with high metastatic and recurrence rates. Accurate histopathologic examination of the specimen and its immunohistochemical analysis are mandatory for a precise diagnosis.
CASE SUMMARY We report a case of a 38 year-old-man who presented with jaundice and upper abdominal discomfort. Multi-detector computed tomography and magnetic resonance imaging showed a large left liver tumor mass, extending to the hepatoduodenal ligament. Left hepatectomy was performed with resection and reconstruction of hepatic artery and preservation of middle hepatic vein. Histopathologic examination confirmed the tumor being a low-grade fibromyxoid sarcoma. Three and a half years after surgery, the patient died after being diagnosed with spine metastasis.
CONCLUSION Due to poor response to all modalities of adjuvant treatment, we consider that the focus of treatment should be on surgery as the only option for curing the disease.
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Affiliation(s)
- Vladimir Dugalic
- Department of Hepatobiliary & Pancreatic Surgery, Clinic for Digestive Surgery, Clinical Center of Serbia, Belgrade 11000, Serbia
| | - Igor I Ignjatovic
- Department of Hepatobiliary & Pancreatic Surgery, Clinic for Digestive Surgery, Clinical Center of Serbia, Belgrade 11000, Serbia
| | | | - Nikola Ilic
- Clinic for Vascular and Endovascular Surgery, Clinical Center of Serbia, Belgrade 11000, Serbia
| | - Jelena Sopta
- Institute of Pathology, University of Belgrade, Belgrade 11000, Serbia
| | - Slavenko R Ostojic
- Department of Hepatobiliary & Pancreatic Surgery, Clinic for Digestive Surgery, Clinical Center of Serbia, Belgrade 11000, Serbia
| | - Dragan Vasin
- Department of Radiology, Clinical Center of Serbia, Belgrade 11000, Serbia
| | - Marko D Bogdanovic
- Department of Hepatobiliary & Pancreatic Surgery, Clinic for Digestive Surgery, Clinical Center of Serbia, Belgrade 11000, Serbia
| | - Igor Dumic
- Mayo Clinic Health System, Mayo Clinic College of Medicine and Science, Rochester, NY 10029, United States
| | - Tamara Milovanovic
- Clinic for Gastroenterology and Hepatology, Clinical Center of Serbia, School of Medicine, University of Belgrade, Belgrade 11000, Serbia
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10
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Pettus JR, Kerr DA, Stan RV, Tse JY, Sverrisson EF, Bridge JA, Linos K. Primary myxoid and epithelioid mesenchymal tumor of the kidney with a novel GLI1-FOXO4 fusion. Genes Chromosomes Cancer 2020; 60:116-122. [PMID: 33159395 DOI: 10.1002/gcc.22916] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 10/28/2020] [Accepted: 11/02/2020] [Indexed: 11/05/2022] Open
Abstract
To our knowledge, we describe the first mesenchymal tumor with a novel GLI1-FOXO4 fusion gene. This well-circumscribed kidney tumor displayed variably myxoid and epithelioid histologic features with a focally nodular growth pattern. The tumor cells showed bland, round to ovoid nuclei, with no overt high-grade features. The tumor showed focal immunopositivity for smooth muscle actin and Melan-A, which raised the possibility of a relationship with a perivascular epithelioid cell tumor. The clinical and morphologic features appear distinct from other reported neoplasms harboring GLI1 or FOXO4 gene rearrangements. The patient underwent radical nephrectomy and is without evidence of disease during a relatively short clinical follow-up period. However, the features of this tumor likely warrant long-term follow-up to monitor for the possibility of a late recurrence or metastasis. In addition to reporting this novel fusion-positive tumor, we also provide a brief review of GLI1 and FOXO4 gene functions in both normal and neoplastic contexts.
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Affiliation(s)
- Jason R Pettus
- Dartmouth-Hitchcock Medical Center, Department of Pathology and Laboratory Medicine, Lebanon, New Hampshire, USA.,Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Darcy A Kerr
- Dartmouth-Hitchcock Medical Center, Department of Pathology and Laboratory Medicine, Lebanon, New Hampshire, USA.,Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Radu V Stan
- Geisel School of Medicine at Dartmouth, Departments of Biochemistry and Cell Biology and of Pathology and Laboratory Medicine, Hanover, New Hampshire, USA
| | - Julie Y Tse
- Foundation Medicine, Inc, Cambridge, Massachusetts, USA
| | - Einar F Sverrisson
- Dartmouth-Hitchcock Medical Center, Department of Surgery, Lebanon, New Hampshire, USA
| | - Julia A Bridge
- The Translational Genomics Research Institute, Division of Molecular Pathology, Phoenix, Arizona, USA.,University of Nebraska Medical Center, Department of Pathology and Microbiology, Omaha, Nebraska, USA
| | - Konstantinos Linos
- Dartmouth-Hitchcock Medical Center, Department of Pathology and Laboratory Medicine, Lebanon, New Hampshire, USA.,Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
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11
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Huang J, Cohen S, Jour G. Primary small intestine mesenteric low-grade fibromyxoid sarcoma with foci of atypical epithelioid whorls and diffuse DOG1 expression: a case report. Diagn Pathol 2020; 15:23. [PMID: 32164724 PMCID: PMC7069053 DOI: 10.1186/s13000-019-0905-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 11/06/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Low-grade fibromyxoid sarcoma (LGFMS) is a rare fibroblastic tumor often involving deep tissue of trunk and lower extremities in young to middle-aged patients. Rarely, LGFMS can occur in other sites including head and neck, chest, abdomen and female reproductive system. Three cases of LGFMS in mesentery of small intestine have been reported and all have conventional histologic features. Herein we reported a unique case of LGFMS in mesentery of small intestine. CASE PRESENTATION A 43 year-old male with chief complaint of lower back pain for 4 years presented to our hospital. Physical exam reveal a firm, non-tender, non-distended, mobile large abdominal mass, which was shown on abdominal CT as a 10 cm retroperitoneal tumor. Biopsy revealed a spindle cell neoplasm in a myxoid background with a delicate vascular network. Tumor resection was performed. Gross examination of the resected specimen showed a 10.8 cm, tan-white, smooth, firm, lobulated mesenteric mass with bulging and gelatinous cut surface and confined within small bowel serosa. Microscopic examination demonstrated foci epithelioid cords and whorls with prominent atypia, in additional of regular, bland-appearing spindle cells in a fibrous and myxoid stroma and osseous metaplasia. The tumor cells stained diffusely positive for DOG1 with moderate staining density, and diffusely and strongly positive for MUC4. Rearrangement involving FUS (16p11.2) gene was identified with break-apart probe and confirmed by Anchored Multiplex PCR. A final diagnosis of low-grade fibromyxoid sarcoma was rendered. CONCLUSION Our case highlights the importance of including LGFMS in the differential diagnosis of mesenteric tumors and the DOG1 positivity which could represent a potential diagnostic pitfall.
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Affiliation(s)
- Jialing Huang
- Department of Pathology, Langone Medical Center, New York University, 550 1st Avenue, New York, NY, 10016, USA.
| | - Steven Cohen
- Department of Surgery, Langone Medical Center, New York University, 550 1st Avenue, New York, NY, 10016, USA
| | - Gerorge Jour
- Department of Pathology, Langone Medical Center, New York University, 550 1st Avenue, New York, NY, 10016, USA
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12
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Mustafa S, VandenBussche CJ, Ali SZ, Siddiqui MT, Wakely PE. Cytomorphologic findings of low-grade fibromyxoid sarcoma. J Am Soc Cytopathol 2020; 9:191-201. [PMID: 32197967 DOI: 10.1016/j.jasc.2020.01.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 01/29/2020] [Accepted: 01/31/2020] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Low-grade fibromyxoid sarcoma (LGFMS) is a rare fibroblastic tumor characterized by a prolonged clinical course and malignant biological behavior. Given its deceptively bland cytomorphology, a diagnosis can be quite challenging notably on fine-needle aspiration (FNA). In an attempt to shed light on some of the distinctive cytomorphologic characteristics, this study was conducted to review all cases of LGFMS in our database, correlating available clinical data, immunohistochemical findings, and molecular analysis. MATERIALS AND METHODS This series included 20 FNAs from 18 patients with a histologically confirmed LGFMS diagnosis from 3 large academic institutions. Detailed cytomorphologic analysis for each case was documented in conjunction with corresponding clinical characteristics and provided ancillary testing. RESULTS Out of 14 adequate FNA samples, 9 (64.2%) demonstrated a mixture of fibrous and myxoid pattern; the majority of cases were composed of deceptively bland tumor cells with rare nuclear pleomorphism and nuclear membrane irregularities. A MUC4 immunostain was performed on 5 specimens; all tested positive (100%). FUS rearrangement was detected in 4 out of 5 cases (80%). Follow-up information revealed 5-year recurrence in 1 case and metastatic disease in 2 cases, to the lung/pleura (8 years) and fourth rib (1 year), respectively. CONCLUSIONS The presence of bland spindle cells and associated with myxoid matrix material, in the appropriate clinical setting, can suggest LGFMS and direct additional confirmatory testing. A definitive diagnosis of LGFMS on FNA requires adequate sampling, familiarity with key cytomorphologic features, acquisition of diagnostic material for a cell block preparation and ancillary testing, and clinicoradiologic correlation.
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Affiliation(s)
- Sara Mustafa
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Christopher J VandenBussche
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, Maryland.
| | - Syed Z Ali
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Radiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Momin T Siddiqui
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York Presbyterian Hospital, New York, New York
| | - Paul E Wakely
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, Ohio
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13
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Abstract
Soft tissue neoplasms with myxoid features are collectively not uncommon. Their often complex differential diagnosis makes them significantly over-represented among consultation cases. This applies not only to sarcomas but in particular to benign lesions as well. Generally, myxoid soft tissue lesions are divided into two major groups: (1) myxoid lesions by definition (which can however rarely be non-myxoid) and (2) rare myxoid variants of otherwise non-myxoid entities.Four major diagnostic challenges are responsible for the complexity of myxoid soft tissue neoplasms: (1) Diagnosis of malignancy in many cases is not based on conventional malignancy criteria but is defined by the entity itself, making under-diagnosis of malignancy likely in entities such as low-grade fibromyxoid sarcoma. (2) On the other hand, harmless myxoid lesions with features of high proliferation, e.g. nodular and proliferative fasciitis, tend to be over-diagnosed as malignant by the unworried. (3) The necessity to assess not only cellular morphology/differentiation, but also the stromal, vascular and architectural characteristics adds to the complexity of the differential diagnostic algorithm. (4) Last but not least, recognition of unexpected myxoid variants of non-myxoid entities is basically impossible if focal conventional areas are absent, underlining the need for high suspicion index and sufficient sampling.This review illuminates the various aspects related to the differential diagnostic workup of these challenging entities.
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14
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Primary low-grade fibromyxoid sarcoma of the large intestine with lung metastases: A case report and review of the literature. HUMAN PATHOLOGY: CASE REPORTS 2019. [DOI: 10.1016/j.ehpc.2018.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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15
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Abstract
Mesenchymal tumors of the uterus comprise a heterogeneous group of neoplasms of varied biologic potential. In addition to being host to several anatomically unique entities, the uterus may contain mesenchymal neoplasms typically found elsewhere in the body. Although smooth muscle neoplasms are common, other mesenchymal neoplasms in this location are relatively rare. Many of these neoplasms exhibit morphologic overlap. In addition to a careful histomorphologic review, definitive classification frequently depends on the judicious application of ancillary immunohistochemical and molecular testing. The intent of this review is to offer a basic approach to the classification of primary uterine mesenchymal neoplasms.
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Affiliation(s)
- Brendan C Dickson
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, 600 University Avenue, Toronto, Ontario M5G 1X5, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.
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