title: Primary retroperitoneal hydatid cyst.
mesh_terms: D001466:Barium Sulfate; D002404:Catheterization; D004443:Echinococcosis / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007813:Laparotomy; D008875:Middle Aged; D012187:Retroperitoneal Space; D014567:Urography
chemical_list: D001466:Barium Sulfate