title: Acquired B-antigen in a patient with a colo-vesical fistula.
mesh_terms: D000017:ABO Blood-Group System / Q000276:immunology*; D000368:Aged; D006801:Humans; D007412:Intestinal Fistula / Q000209:etiology*; D007518:Isoantibodies / Q000032:analysis*; D008297:Male; D012810:Sigmoid Diseases / Q000209:etiology*; D012811:Sigmoid Neoplasms / Q000150:complications* / Q000276:immunology; D001747:Urinary Bladder Fistula / Q000209:etiology*
chemical_list: D000017:ABO Blood-Group System; D007518:Isoantibodies