More about an acquired group B antigen.
D000017:ABO Blood-Group System; D000368:Aged; D000906:Antibodies / Q000032:analysis; D000941:Antigens / Q000032:analysis*; D003110:Colonic Neoplasms / Q000175:diagnosis / Q000601:surgery; D003298:Coombs Test; D004912:Erythrocytes / Q000276:immunology; D006801:Humans; D008297:Male
D000017:ABO Blood-Group System; D000906:Antibodies; D000941:Antigens