Premature newborn with abdominal distension Pediatric Imaging Gastrointestinal August 1, 2019November 13, 2023 Supine AXR (left) shows free air underneath the diaphragm while the left lateral decubitus AXR (right) shows free air between the abdominal wall and liver and a small amount of portal venous gas. The diagnosis was necrotizing enterocolitis. Related Published August 1, 2019November 13, 2023