Sex cord-stromal (gonadal stromal) tumors of the testis: a report of 5 cases.

Sex cord-stromal (gonadal stromal) tumors of the testis account for less than 4 per cent of the testicular tumors. The Leydig cell tumor in a child may produce isosexual virilization (case 3). In the adult it may have no endocrine manifestation (case 1) or gynecomastia and decrease in libidio may result from production of estrogens (case 2). Sertoli cell tumors (case 4) and granulosa cell tumors (case5) are rare.