As previously reported, Inhibin is expressed in the vast majority of cases, except in fibroma-thecoma, where it may be negative [27], [28]; GATA-4 has been recently found to be expressed in adult ovarian GCT and in testis SLCT [8], [29] and to be associated with an aggressive behaviour in adult Granulosa Cell Tumors [9]. The gene discussed is GATA4; the disease is granulosa cell tumor.