title: What diagnostic tests are available for screening the rectum, the colon, and the lower gastrointestinal tract?
authors.affiliation: Bowman Gray School of Medicine, Winston-Salem, NC 27157, USA.
authors.forename: D W
authors.initials: DW
authors.lastname: Gelfand
mesh_terms: D001466:Barium Sulfate; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D003287:Contrast Media; D004064:Digestive System / Q000000981:diagnostic imaging; D004733:Enema; D006801:Humans; D009780:Occult Blood; D011859:Radiography
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate