Retrovesical echinococcal cyst causing acute urinary retention.

A case report of a fifty-six-year-old man with acute urinary retention due to a retrovesical echinococcal cyst is presented. He had a history of surgery for hepatic hydatidosis; diagnosis was made preoperatively with the help of conventional x-ray studies, pelvic sonography, and CT scanning. Treatment consisted of removal of the cyst.