title: Pneumatosis intestinalis and pneumoperitoneum due to a solitary sigmoid diverticulum.
abstract: A man aged 75 developed abdominal pain during treatment with steroids for periarteritis nodosa. Laparotomy disclosed air in the peritoneum, and a section of the sigmoid colon contained numerous airfilled cysts and the mesocolon was emphysematic. A solitary diverticulum communicated with a fistula extending into the mesocolon. Neither inflammation, nor other diverticula were seen at the histological examination.
mesh_terms: D000368:Aged; D004241:Diverticulum, Colon / Q000150:complications* / Q000601:surgery; D006801:Humans; D007412:Intestinal Fistula / Q000150:complications / Q000601:surgery; D008297:Male; D011006:Pneumatosis Cystoides Intestinalis / Q000209:etiology* / Q000601:surgery; D011027:Pneumoperitoneum / Q000209:etiology* / Q000601:surgery