title: Calyceal obstruction due to parapelvic cyst.
mesh_terms: D004322:Drainage; D006801:Humans; D007674:Kidney Diseases / Q000209:etiology*; D052177:Kidney Diseases, Cystic / Q000150:complications* / Q000175:diagnosis / Q000628:therapy; D007682:Kidney Pelvis; D011859:Radiography; D012077:Renal Artery / Q000000981:diagnostic imaging