[The accessory scrotum. Apropos of 2 cases].

The authors report two new cases of accessory scrotum. It is an exceptional pathology. The review of the literature allowed to collect thirteen other cases. The aspect of accessory scrotum was a soft mass with scrotal skin and no content. All were located on perineal area; on the midline for ten, lateral to the raphe for four (two on the left and two on the right). Both testes were palpable in the normal scrotum. There was no polyorchidism. For all but five, the accessory scrotum was a single anomaly. Five children presented another genital problem with for four of them a second infrequent scrotal malformation (bifid scrotum or peno-scrotal transposition). Surgical treatment is easy. Histologic examination shows a true scrotal skin with muscular fibers in subcutaneous tissue, like tunica dartos. The "tumor" contains an homogeneous fat tissue. The origin of accessory scrotum is not clear. It does not seem to be a teratoma. Probably it is the result of abnormal migration with a division of labio-scrotal swellings. It is not the same as ectopic scrotum, in which localization is variable, testis is present in the abnormal scrotum or its area and in which there is only one opposite half-scrotum in its normal place.