Premature newborn now 9 months old with abdominal distension Pediatric Imaging Gastrointestinal April 15, 2026February 19, 2026 AXR AP (above) shows curvilinear air throughout the wall of the colon from the cecum to the rectosigmoid colon which is also appreciated on the AXR left lateral decubitus (below). There was no free air or portal venous gas. The diagnosis was pneumatosis intestinalis of the colon of unknown etiology. Related Published April 15, 2026February 19, 2026