[Seminal vesicle cyst associated with contralateral renal agenesis: a case report].

A 37-year-old man was hospitalized for a more extensive examination of azoospermia. A seminal vesiculogram demonstrated a cystic lesion of the right seminal vesicle, but failed to show the left seminal vesicle because of intrascrotal adhesion caused by previous orchidopexy. A transrectal ultrasonogram and CT-scan revealed a large cystic mass in the retrovesical region. At urethrocystoscopy, the left half of the trigone and left ureteral orifice were absent, and the verumontanum increased in size. Bilateral testicular biopsies demonstrated a small type of the seminiferous tubule showing a thickening of the basement membrane and low spermatogenesis. The cystic mass was examined by transabdominal needle aspiration under the guidance of supurapubic ultrasound. Microscopic examination of the cystic fluid obtained revealed a few immobile spermatozoa. The patient was not subjected to any surgical intervention.