Seyed Mehdi Ghamsari - Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
Fereidoon Saberi Afshar - Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
Alireza Bashiri - Graduated in Veterinary Surgery, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
Peyman Azizi - Postgraduate Student in Veterinary Surgery, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
Omid Azari - Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.

Diaphragmatic hernias are an uncommon cause of abdominal pain in horses. The following case report describes a diaphragmatic hernia in ۲ adult horses with signs of acute colic. A six-year-old stallion and a seven-year-old mare were referred to the emergency duty for severe abdominal pain; for a six-month period from late ۲۰۲۱ to early ۲۰۲۲. The horses were subjected to explorative laparotomy, which revealed a migration of the large colon associated with volvulus (in stallion); and small intestine protrusion (in mare) in thoracic space. Necropsy revealed a diaphragmatic chronic rupture (approximately ۱۳ centimeters in diameter) in the left mid-region with the protrusion of the large colon in the thoracic cavity in the male horse; and a diaphragmatic acute rupture (approximately ۳ centimeters in diameter) in the left dorsolateral region with the incarceration of jejunum in thoracic cavity in the mare. This case report demonstrated that a diaphragmatic hernia should be considered as a differential diagnosis in equine colic.

horse, Diaphragm, Hernia, Colic