Infant with vomiting for 2 days and bloody stools for 1 day

AXR and air enema of ileocolic intussusception
AXR supine (left) shows multiple dilated loops of small bowel. AXR upright (right) shows a round soft tissue mass filling the lumen of the mid transverse colon. AP image from an air enema (below) shows reduction of the soft tissue mass to the cecum just before it disappeared and a large amount of air was observed to reflux into the terminal ileum.

The diagnosis was ileocolic intussusception causing a distal small bowel obstruction which was successfully reduced.