[Leydigioma--rare testicular tumor diagnosed in an adult male with undescended intraabdominal testis].

Leydig cell tumours deriving from the gonadal stroma represent one per cent of all testicular tumours. They may occur at any age. Ten per cent of cases are malignant. There is no evidence that they are prone to develop in undescended testis. We report the rare case of leydigioma in 71 year old man with unilateral cryptorchidism. Only a few cases have been reported as arising from undescended testis.