title: Why are small-bowel tumours so rare?
mesh_terms: D002273:Carcinogens / Q000378:metabolism; D006801:Humans; D007414:Intestinal Neoplasms / Q000453:epidemiology* / Q000276:immunology; D007421:Intestine, Small / Q000276:immunology / Q000378:metabolism / Q000382:microbiology / Q000502:physiology; D008223:Lymphoma / Q000276:immunology; D008545:Melanoma / Q000276:immunology
chemical_list: D002273:Carcinogens