Low-grade fibromyxoid sarcoma (LGFMS) is a rare, low-grade malignant soft tissue neoplasm. It is a distinctive variant of fibrosarcoma with a high metastasizing potential and sometimes long interval between tumor presentation and metastasis. It may present in any part of body. However in the region of the head and neck, they are seldom seen and hence easily misdiagnosed. We report the case of an 18-year-old female who developed a large mass in the left oral cavity. The tumor was excised. On pathology evaluation was diagnosed as LGFMS. Due to the relative rarity of LGFMS, there is no dedicated protocol regarding follow-up recommendations.
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http://dx.doi.org/10.1007/s12070-015-0946-0 | DOI Listing |
Virchows Arch
December 2024
Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, 350 W. 11thStreet, Room 4086, Indianapolis, IN, 46202, USA.
Sclerosing epithelioid fibrosarcoma (SEF) was originally described as a peculiar variant of fibrosarcoma in 1995. Subsequent studies showed that conventional SEF was associated with both immunohistochemical expression of MUC4 and EWSR1/FUS gene rearrangements with CREB3L1 as the predominant fusion partner. Since then, a distinct group of fibrous tumors characterized by YAP1::KMT2A and KMT2A::YAP1 gene rearrangements and SEF-like morphology has been described.
View Article and Find Full Text PDFAm J Surg Pathol
November 2024
Department of Pathology, Faculty of Medicine in Pilsen, Charles University, Prague.
TFE3 rearrangements characterize histogenetically, topographically, and biologically diverse neoplasms. Besides being a universal defining feature in alveolar soft part sarcoma (ASPS) and clear cell stromal tumor of the lung, TFE3 fusions have been reported in subsets of renal cell carcinoma, perivascular epithelioid cell tumor (PEComa), epithelioid hemangioendothelioma and ossifying fibromyxoid tumors. TFE3 -related neoplasms are rare in the head and neck and may pose diagnostic challenges.
View Article and Find Full Text PDFAm J Surg Pathol
January 2025
Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.
The aim of the study was to report the outcome of primary localized low-grade fibromyxoid sarcoma (LGFMS), sclerosing epithelioid fibrosarcoma (SEF), and hybrid LGFMS/SEF (H-LGFMS/SEF). Patients with primary localized LGFMS, SEF, or H-LGFMS/SEF, surgically treated with curative intent from January 2000 to September 2022, were enrolled from 14 countries and 27 institutions. Pathologic inclusion criteria were predefined by expert pathologists.
View Article and Find Full Text PDFCancers (Basel)
October 2024
Department of Diagnostics and Public Health, Section of Pathology, University of Verona, 37134 Verona, Italy.
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