title: Pneumoperitoneum due to pneumatosis cystoides intestinalis in idiopathic megacolon.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008531:Megacolon / Q000150:complications*; D008875:Middle Aged; D011006:Pneumatosis Cystoides Intestinalis / Q000150:complications* / Q000175:diagnosis; D011027:Pneumoperitoneum / Q000209:etiology*