A case of hypertrophic pyloric stenosis diagnosed by gastroscopy was reported in a 4-years-old Quarter Horse gelding, with signs of inappetence, chronic weight loss, colic, bruxism and sialorrhea. Gastroduodenal ulceration and spasms were supposed as causes of pyloric muscular hypertrophy and stenosis. Antiulcerative medications are merely palliative and the complex surgical approach to the site of stenosis makes the prognostic to be doubtful.
pyloric; stenosis; horse; gastric
