Chronic intestinal pseudo-obstruction in a horse: a case of myenteric ganglionitis.

An 11-year-old Quarter horse mare was presented for recurrent episodes of colic. A chronic intestinal pseudo-obstruction was diagnosed. Medical treatment and surgical resection of the colon were performed but the condition did not improve and the horse was euthanized. Histopathological examination revealed a myenteric ganglionitis of the small intestine and ascending colon.