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→Extrinsic
====== Extrinsic ======
====== Extrinsic ======
Obstruction of the intestine due to external factors such as tumours, abscesses, and fibrous adhesions following peritonitis, perforation or surgery is a common occurrence.
*Neoplasia in structures adjacent to the intestines can spread and cause external compression. Pancreatic tumours in particular can extend and impinge on the duodenum.
*Inflammatory adhesions following peritonitis or surgery for example consist of fibrous tissue bands that may restrict intestinal motility and cause kinks in the mesentery.
*Pedicles of tumours such as lipomas in horses can become wound in loops of intestine leading to obstruction and possible strangulation.
*Prostatic enlargement in the dog can lead to compression of the rectum.
===== Functional =====
===== Functional =====