title: Complete prolapse of a massive rectal villous adenoma.
mesh_terms: D000236:Adenoma / Q000000981:diagnostic imaging*; D000368:Aged; D001466:Barium Sulfate; D004733:Enema; D006801:Humans; D008297:Male; D011859:Radiography; D012004:Rectal Neoplasms / Q000000981:diagnostic imaging*; D012005:Rectal Prolapse / Q000209:etiology*
chemical_list: D001466:Barium Sulfate