title: Obstructive azoospermia due to retrovesical hydatid cyst.
mesh_terms: D004443:Echinococcosis / Q000150:complications* / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D009845:Oligospermia / Q000209:etiology*; D011860:Radiography, Abdominal; D001748:Urinary Bladder Neck Obstruction / Q000209:etiology*