Sonographic features of pneumatosis of the small bowel.

Pneumatosis intestinalis has been associated with gangrene of the bowel, collagen vascular disease, chronic bronchitis and asthma, ulcer disease and diverticulitis. Gangrene of the small bowel is a rare cause of acute abdomen, which is more often caused by arterial thrombosis or a volvulus. The radiological features of this condition are well described. The sonographic features of one case of gangrene of the small bowel with intramural air is presented here.