title: Carcinogenesis of gastrointestinal cancer.
mesh_terms: D000236:Adenoma / Q000453:epidemiology / Q000209:etiology*; D000328:Adult; D003110:Colonic Neoplasms / Q000453:epidemiology / Q000209:etiology; D004032:Diet; D005770:Gastrointestinal Neoplasms / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009603:Nitroso Compounds / Q000378:metabolism; D012004:Rectal Neoplasms / Q000209:etiology; D013274:Stomach Neoplasms / Q000453:epidemiology / Q000209:etiology
chemical_list: D009603:Nitroso Compounds