title: Unusual neoplasms involving the colon.
mesh_terms: D000368:Aged; D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011859:Radiography; D012004:Rectal Neoplasms / Q000175:diagnosis