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Created page with '* Neoplasia in structures adjacent to the intestines can spread and cause external compression. * Pancreatic tumours in particular can extend and impinge on the [[Duodenum - Ana…'
* Neoplasia in structures adjacent to the intestines can spread and cause external compression.
* Pancreatic tumours in particular can extend and impinge on the [[Duodenum - Anatomy & Physiology|duodenum]].
* Pedicles of tumours such as lipomas in horses can become wound in loops of intestine leading to obstruction and possible strangulation.
[[Image:Pedunc_lipoma_closeup.jpg|thumb|right|150px|Closeup of a pedunculated lipoma (Courtesy of Elspeth Milne)]]
* '''Clinical'''
** Occasional [[Control of Feeding - Anatomy & Physiology#The Vomit Reflex|vomiting]] and ntermittent [[Intestine Diarrhoea - Pathology|diarrhoea]] over several weeks.
* '''Pathogenesis'''
** Seen occasionally in cat (rarer in dog)
** Usually towards end of intestines
*** E.g. at the ileocaecocolic valve.
** Gut proximal to tumour becomes thickened due to hypertrophy of smooth muscle as a result of trying to force ingesta past progessively narrowing lumen.
** Produces "hose pipe intestine".
** Seen with carcinoma, lymphoma, leiomyoma and other tumours.
[[Category:Intestine_-_Mechanical_Obstruction]]
* Pancreatic tumours in particular can extend and impinge on the [[Duodenum - Anatomy & Physiology|duodenum]].
* Pedicles of tumours such as lipomas in horses can become wound in loops of intestine leading to obstruction and possible strangulation.
[[Image:Pedunc_lipoma_closeup.jpg|thumb|right|150px|Closeup of a pedunculated lipoma (Courtesy of Elspeth Milne)]]
* '''Clinical'''
** Occasional [[Control of Feeding - Anatomy & Physiology#The Vomit Reflex|vomiting]] and ntermittent [[Intestine Diarrhoea - Pathology|diarrhoea]] over several weeks.
* '''Pathogenesis'''
** Seen occasionally in cat (rarer in dog)
** Usually towards end of intestines
*** E.g. at the ileocaecocolic valve.
** Gut proximal to tumour becomes thickened due to hypertrophy of smooth muscle as a result of trying to force ingesta past progessively narrowing lumen.
** Produces "hose pipe intestine".
** Seen with carcinoma, lymphoma, leiomyoma and other tumours.
[[Category:Intestine_-_Mechanical_Obstruction]]