Clinically occult Leydig cell tumor in a cryptorchid man. Report of a case presenting with unilateral gynecomastia and impotence.

Left painful breast enlargement and impotence were the main complaints of a right cryptorchid young man. On ultrasonography a hypoechoic mass was found in the right testis. Postoperatively the increased level of estrogens and the decreased levels of testosterone were normalized 6 months following the orchiectomy, gynecomastia subsided considerably and the impotence improved quite satisfactorily.