title: A, B, and O substances in gastrointestinal carcinoma.
mesh_terms: D000017:ABO Blood-Group System; D000230:Adenocarcinoma / Q000276:immunology; D002288:Adenocarcinoma, Mucinous; D000941:Antigens; D005455:Fluorescent Antibody Technique; D005770:Gastrointestinal Neoplasms / Q000276:immunology*; D006801:Humans; D066298:In Vitro Techniques
chemical_list: D000017:ABO Blood-Group System; D000941:Antigens