[Retrovesical hydatid cyst].
D004443:Echinococcosis / Q000150:complications*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012002:Rectal Diseases / Q000209:etiology*
Quiste hidatídico retrovesical.