Abstract
A 2-year-old Arabian horse was presented with severe colic symptoms. During explorative laparotomy, a jejuno-jejunal invagination secondary to a submucosal intestinal mass was detected. The involved jejunal segment was surgically removed and an end-to-end anastomosis was created. Opening the specimen demonstrated the presence of a nodular mass on the head of the intussusceptum, measuring 10 cm in diameter, and almost completely obliterating the intestinal lumen. Additionally, a severe hyperemia of the jejunal mucosa was visible. Histological examination, which revealed a well-demarcated mass in the submucosa of the jejunum consisting of well-differentiated adipocytes, led to the diagnosis of an intramural lipoma. The small intestinal mucosa displayed mild to moderate signs of congestion. Pedunculated lipomas in the mesentery of horses causing intestinal volvulus and obstruction are a frequent cause of small-intestine strangulation in aged horses. To the authors' knowledge, intramural intestinal lipomas to date have not been described in the horse. The mare recovered without complications and was free of colic symptoms after 6 months.
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