Other intra-abdominal tumors with clear cell morphology, within the scope of differential diagnosis, included myoepithelial carcinoma, epithelioid leiomyosarcoma, melanoma, perivascular epithelioid cell tumor, paraganglioma, gastrointestinal stromal tumor, epithelioid angiosarcoma, and epithelioid sarcoma.[11] Carcinomas in general were excluded by absent immunostaining for markers such as B72.3, Ber-EP4, and poly-CEA.[12,13]. The gene discussed is EPCAM; the disease is melanoma.