title: Nonoperative extraction of retained biliary tract stones requiring multiple sessions.
mesh_terms: D001653:Bile Ducts, Intrahepatic; D002758:Cholangiography; D002769:Cholelithiasis / Q000000981:diagnostic imaging / Q000601:surgery / Q000628:therapy*; D003135:Common Bile Duct / Q000601:surgery; D003549:Cystic Duct; D042882:Gallstones / Q000000981:diagnostic imaging / Q000601:surgery / Q000628:therapy; D006801:Humans; D008722:Methods; D011182:Postoperative Care; D011183:Postoperative Complications / Q000628:therapy*