Ascaris in the biliary system.
D001196:Ascariasis / Q000000981:diagnostic imaging*; D003135:Common Bile Duct / Q000601:surgery*; D003137:Common Bile Duct Diseases / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008875:Middle Aged; D011183:Postoperative Complications; D011859:Radiography