Diaphragmatic hernia in horses is uncommon but has been well recognised historically (Perdrizet et al., 1989). The congenital type has smooth round edges observed in the left dorsal quadrant of the diaphragm in foals while acquired ones may occur at any age and are usually the result of violent exercise, increased abdominal pressure or dilatation of the stomach or intestines. The predominant clinical sign is colic associated with or without respiratory distress (Bristol, 1986). This communique dealswith a case of diaphragmatic hernia with signs of severe colic and respiratory distress.
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