title: Verification of superficial biopsy sites by barium enema.
mesh_terms: D000368:Aged; D001466:Barium Sulfate; D001706:Biopsy / Q000379:methods*; D004733:Enema; D006801:Humans; D008297:Male; D011351:Proctoscopy; D011859:Radiography; D012002:Rectal Diseases / Q000000981:diagnostic imaging*; D012007:Rectum / Q000000981:diagnostic imaging*
chemical_list: D001466:Barium Sulfate