Primary retroperitoneal hydatid cyst (a report of 3 cases and review of the literature).
D000328:Adult; D000368:Aged; D004443:Echinococcosis / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012187:Retroperitoneal Space