A disappearing colon tumor.
D003110:Colonic Neoplasms / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D006801:Humans; D007417:Intestinal Polyps / Q000175:diagnosis; D008067:Lipoma / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D011859:Radiography