Abstract
A case of pneumatosis cystoides intestinalis is reported. An 84-year-old woman visited the hospital because of severe right hypochondrial pain. Abdominal X-ray examination revealed a free air in the intraperitoneal cavity. Though peritoneal irritation was mild, a possible occurrence of intestinal perforation could not be denied, because of her advanced age and the lasting abdominal pain. Lapalotomy was performed. Cholecystlithiasis accompanying by gallstones, duodenal diverticulum, and a number of intramural small cysts of the ileum were found, but there was no perforation. From pathological findings, a definite diagnosis of pneumatosis cystoides intestinalis was made. It is thought that the free air might attribute to the disease and severe pain to gall stones. Postoperative course was uneventful, and the patient was discharged from the hospital.