Newborn with failure to pass meconium

Enema of ileal atresia
AXR supine (above left) and AXR left lateral decubitus (above right) show multiple dilated loops of bowel with no gas in the rectum. AP (below left) and lateral (below right) views of an enema show the colon to be small in diameter throughout its length (microcolon) and to contain filling defects representing pellets of meconium. The terminal ileum could not be refluxed despite multiple attempts to do so.

The diagnosis was ileal atresia.