Teenager with cystic fibrosis and abdominal pain

AXR and barium enema of distal intestinal obstruction syndrome
AXR (left) shows a distal small bowel obstruction. Water-soluble contrast enema (right) shows the cecum flipped up into the left upper quadrant with the stool-filled terminal ileum outlined by contrast just beneath it.

The diagnosis was distal intestinal obstruction syndrome.