PAX8 and carcinoma: Other markers, such as PS100, MelanA, HMB45, SOX10, Chromogranin, Synaptophysin, CD56, PAX8 and a large panel of cytokeratins (CK7, CK20, panCK, MNF116), were all negative (not shown), eliminating melanoma, PEComa and carcinoma (notably renal cell carcinoma).