Congenital anterior urethral diverticulum associated with bilateral urinomas and dysplastic kidneys.

Congenital anterior urethral diverticulum (AUD) is a rare condition. We report a case of AUD associated with urinary ascites, bilateral urinomas and dysplastic kidneys. The diagnosis of urethral obstruction was established in utero by means of ultrasound. The right perirenal urinoma appeared "septated", and we believe that this is related to its hemorrhagic content. Improvement of the clinical condition and renal function was noted after decompression by bilateral cutaneous loop ureterostomy.