Intestinal malrotation


Intestinal malrotation is a congenital anatomical anomaly that results from an abnormal rotation of the gut as it returns to the abdominal cavity during embryogenesis.

Depending on the degree of malrotation, CT may show:

  • absence of a retro-mesenteric (retro-peritoneal) D3 segment of the duodenum 
  • abnormal SMA (smaller and more circular)/SMV relationship
  • large bowel predominantly on the left and small bowel predominantly on the right