Congenital retrosternal (Morgagni) diaphragmatic hernias in three horses.

Case Description: 3 Horses were examined and treated because of sudden onset of signs of abdominal pain.

Clinical Findings: All horses had a retrosternal (Morgagni) hernia involving the right side of the diaphragm. In each horse, the large colon was incarcerated in a right muscular defect in the diaphragm with a large hernial sac.