title: Gallstone ileus: an analysis of 20 patients.
mesh_terms: D000368:Aged; D002769:Cholelithiasis / Q000150:complications*; D003108:Colonic Diseases / Q000209:etiology / Q000601:surgery; D005260:Female; D006801:Humans; D007077:Ileal Diseases / Q000209:etiology / Q000601:surgery; D007415:Intestinal Obstruction / Q000209:etiology / Q000601:surgery*; D007579:Jejunal Diseases / Q000209:etiology / Q000601:surgery; D008297:Male; D008875:Middle Aged