[A patient of the acute phase with severe ischemic enteritis accompanied by portal venous gas who survived conservative treatment].

A 90-year-old man had chest pain. Portal venous gas and ileal edema were noted on abdominal CT, and severe ischemic enteritis was diagnosed. Conservative treatment was performed because of circulatory failure. Later, ileus slowly developed, and ileal stenosis was noted on contrast imaging through an ileus tube. Laparoscopy-assisted small bowel resection was performed and achieved remission. Emergency surgery is performed for portal venous gas in acute celiopathy because it may result in intestinal necrosis, but it is also necessary to consider conservative treatment for maintaining mesenteric blood flow in cases difficult to treat by surgery.