title: An unusual bowel pseudotumor.
mesh_terms: D000368:Aged; D003108:Colonic Diseases / Q000175:diagnosis*; D003110:Colonic Neoplasms / Q000175:diagnosis*; D003937:Diagnosis, Differential; D004108:Dilatation, Pathologic / Q000175:diagnosis; D005243:Feces; D005740:Gases; D006801:Humans; D007415:Intestinal Obstruction / Q000175:diagnosis; D008297:Male; D014463:Ultrasonography
chemical_list: D005740:Gases