Sclerosing epithelioid fibrosarcoma: a study of five cases emphasizing diagnostic criteria.
Affiliation
Christie Hospital NHS Trust, Manchester, UK.Issue Date
1998-10
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AIMS: To study the clinical and histopathological features of sclerosing epithelioid fibrosarcoma, and to define diagnostic criteria for this uncommon soft-tissue tumour. METHODS AND RESULTS: Standard histological, immunohistochemical and ultrastructural techniques were applied to five tumours from head and neck, chest wall and groin. Tumours consisted of groups of monomorphic rounded/epithelioid cells surrounded by a prominent collagenous stroma. Tumour cells showed positive vimentin staining but were negative for other markers. They contained prominent rough endoplasmic reticulum and a large Golgi apparatus which in one case was producing collagen secretion granules, an ultrastructural marker for collagen production. Three patients had medium to long-term survival (3-7 years). Of these, one was disease-free for 3 years, and two experienced multiple recurrences: one of the latter died of metastatic disease. CONCLUSION: Criteria for diagnosing this uncommon tumour include: small to medium cell size, clear or pale cytoplasm, cellular arrangement in cords and strands, dense collagenous stroma; vimentin staining; rough endoplasmic reticulum and a Golgi apparatus producing, in well preserved examples, collagen secretion granules. The paper emphasizes the value of electron microscopy, supporting an appropriate histological picture and immunophenotype, in identifying these relatively low-grade sarcomas.Citation
Sclerosing epithelioid fibrosarcoma: a study of five cases emphasizing diagnostic criteria. 1998, 33 (4):354-60 HistopathologyJournal
HistopathologyPubMed ID
9822926Type
ArticleLanguage
enISSN
0309-0167Collections
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