Duodenoduodenal intussusception in a 16‐year‐old German Warmblood mare.

Summary: A 16‐year‐old German Warmblood mare was presented with an acute history of abdominal pain that failed to respond to medical treatment. Diagnostic evaluations including transabdominal and transrectal ultrasound and palpation were suggestive of a small‐intestinal intussusception. Exploratory laparotomy revealed a duodenoduodenal intussusception of the proximal and middle third of the duodenum. The horse was subjected to euthanasia due to the poor prognosis. The post‐mortem examination showed the intussusception to be associated with a pseudodiverticulum orally to the intussusception and duodenal muscular hypertrophy. [ABSTRACT FROM AUTHOR]