Sites of congenital diaphragmatic hernia formation

Herniation usually occurs on the left (80 to 85%); right-sided diaphragmatic hernias occur in only 10 to 15% of cases. Bilateral herniation is uncommon (<2%). With left-sided herniation, the stomach is often involved, while the liver is often involved when the hernia is on the right; however, the liver may herniate even with left-sided CDH. Both right- and left-sided hernias involve bowel.