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[[Image:intussusception.jpg|thumb|right|150px|Diagram of intussuscception (Courtesy of Elspeth Milne)]]
[[Image:intussusception.jpg|thumb|right|150px|Diagram of intussuscception (Courtesy of Elspeth Milne)]]
==Clinical==
==Clinical==
====Colonoscopy====
====Colonoscopy====
This can be used to identify ileocolic or caecocolic intussusception.
This can be used to identify ileocolic or caecocolic intussusception.
Intussusception can occur in the [[Small Intestine - Anatomy & Physiology|small intestine]], [[Caecum - Anatomy & Physiology|caecum]] or [[Colon - Anatomy & Physiology|colon]].
====Pathogenesis====
[[Image:intussuceptionphoto.jpg|thumb|right|150px|Intersusception (Courtesy of Bristol BioMed Image Archive)]]
The proximal intestine invaginates into the adjacent distal portion, taking its mesenteric attachment with it. Compression of the mesenteric vessels obstructs venous drainage of the gut, resulting in venous congestion, leading to swelling and oedema.
*** Inflammatory exudate from serous surface.
**** Fibrinous adhesions form between surfaces making structure irreducible.
* May progress to necrosis and gangrene of the tissue.
* There is often functional obstruction to bowel.
* May rupture, leading to peritonitis and death.
*Associated with anything that raises peristalsis e.g. change in diet, bacterial infection.
** Foreign body
** Intramural abscess/tumour
** Heavy parasitism
** Previous intestinal surgery
** Enteritis
** Other motility disorders.
** Change in diet
** Bacterial infection
====Pathology====
* When operate or at post mortem see large sausage shaped distension of length of intestine.
* Intussusception may occur post mortem
** There are no associated changes
** The condition is easilt reducible.