Unusual suppression of secretion of blood group substance A.
D000941:Antigens; D001789:Blood Group Antigens; D004912:Erythrocytes; D006801:Humans; D008297:Male; D008875:Middle Aged; D012516:Osteosarcoma / Q000150:complications*; D012463:Saliva / Q000032:analysis*
D000941:Antigens; D001789:Blood Group Antigens