[Infected cyst of the seminal vesicle associated with malformation of the upper urinary tract and contralateral vesiculitis. Embryonal and clinical aspects].

Congenital cyst of the seminal vesicle is a rare anomaly related with developmental anomaly of the mesonephric duct that is frequently associated with unilateral malformation of the upper urinary tract. New imaging techniques (ultrasound, CT, MRI) have allowed us to rediscover and study seminal vesicle disorders and its adjacent area. These techniques have afforded a better definition of cyst characteristics, its contents and anatomic relations, thus permitting more effective surgical treatment.