This tumor, however, is composed of highly monotone spindle cells which are embedded in an acellular fibrous stroma [9] Immunohistochemically granulosa cell tumor is positive for inhibin, vimentin and calretinin,negative for epithelial membrane antigen (EMA), placental alkaline phosphotase,synaptophysin and lymphoid markers. The gene discussed is CALB2; the disease is neoplasm.