|Classification and external resources|
The diagnosis is made by examination of tissue, e.g. a biopsy. The diagnosis may be delayed because of the unusual nature of the tumour and its rarity. Its histomorphology near perfectly may mimic an adenocarcinoma, melanoma or granuloma.
Their immunohistochemical profile may mimic those of carcinomas; thus, these tumours may be misdiagnosed as such.
- Miettinen, M.; Fanburg-Smith, JC.; Virolainen, M.; Shmookler, BM.; Fetsch, JF. (Aug 1999). "Epithelioid sarcoma: an immunohistochemical analysis of 112 classical and variant cases and a discussion of the differential diagnosis.". Hum Pathol 30 (8): 934–42. PMID 10452506.
- Kato H, Hatori M, Kokubun S, et al. (March 2004). "CA125 expression in epithelioid sarcoma". Jpn. J. Clin. Oncol. 34 (3): 149–54. PMID 15078911.