Newborn with failure to pass meconium

Enema of colonic atresia
AXR (left) shows multiple dilated loops of bowel with an extremely dilated loop of bowel in the lower abdomen. AP (above right) and lateral (below right) images from an enema show a microcolon with contrast reaching the level of the cecum but not refluxing the terminal ileum, despite multiple attempts.

The diagnosis was colonic atresia.