Newborn with failure to pass meconium Pediatric Imaging Gastrointestinal January 10, 2019July 16, 2019 The AXR (left) shows a distal bowel obstruction. The enema (right) shows a microcolon with opacification of only the descending colon. The diagnosis was colonic atresia. Related Published January 10, 2019July 16, 2019