Meckel's diverticulum is vestigial remnant of the omphalomesenteric duct. He was also anaemic due to blood loss through the malignant ileal ulcer. There is abrupt demarcation between normal bowel and bowel with thickened wall and ark red necrotic mucosa. Histological examination of the specimen reveals oedema and recent haemorrhage throughout all layers of the wall. The mucosal surface is formed by necrotic and haemorrhagic mucosa, mixed with neutrophilic or cuboidal epithelial cells.
Histological appearance is of incipient haemorrhagic infarction of the intestine.
From a three year old pony mare with a 24-hour history of colic. At laparotomy 100 cms of small intestine was resected. Intestinal infarction in the horse is commonly a sequel to mesenteric arterial occlusion by strongyle-induced thrombosis. 6-year old hunter gelding had an episode of acute colic with severe pain, rapidly rising pulse rate, abdominal distension. Laparotomy revealed an irreducible torsion of part of the root of the mesentery of the small intestine.