title: The coexistence of duodenal ulcer and gastric carcinoma.
mesh_terms: D000017:ABO Blood-Group System; D000230:Adenocarcinoma / Q000150:complications*; D001789:Blood Group Antigens; D002277:Carcinoma / Q000150:complications*; D004381:Duodenal Ulcer / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013274:Stomach Neoplasms / Q000150:complications*
chemical_list: D000017:ABO Blood-Group System; D001789:Blood Group Antigens