Changes

*** Seen in animals that develop [[Gastric Dilatation and Volvulus|torsion of the stomach]]; however, they usually die first.

*** Seen in animals that develop [[Gastric Dilatation and Volvulus|torsion of the stomach]]; however, they usually die first.

** '''Horses'''  

** '''Horses'''  

*** The equine [[Forestomach - Anatomy & Physiology|stomach]] may rupture if the animal eats too much, as the horse cannot [[Control of Feeding - Anatomy & Physiology#The Vomit Reflex|vomit]].

*** The equine [[Monogastric Stomach - Anatomy & Physiology|stomach]] may rupture if the animal eats too much, as the horse cannot [[Control of Feeding - Anatomy & Physiology#The Vomit Reflex|vomit]].

===Pathogenesis===

===Pathogenesis===

* Rupture usually occurs along greater curvature.   

* Rupture usually occurs along greater curvature.   

* While the muscle ruptures, the mucosa does not as it is much more flexible.  

* While the muscle ruptures, the mucosa does not as it is much more flexible.  

** Occasionally [[Forestomach - Anatomy & Physiology|stomach]] ruptures completely.

** Occasionally [[Monogastric Stomach - Anatomy & Physiology|stomach]] ruptures completely.

* Bacteria invade the abdomen, producting peritonitis.

* Bacteria invade the abdomen, producting peritonitis.

** Horses are acutely sensitive to peritonitis (ruminants are much less so).

** Horses are acutely sensitive to peritonitis (ruminants are much less so).

===Note===

===Note===

* Post- mortem rupture of the [[Forestomach - Anatomy & Physiology|stomach]] may be seen in horses that have been dead for a few days.

* Post- mortem rupture of the [[Monogastric Stomach - Anatomy & Physiology|stomach]] may be seen in horses that have been dead for a few days.

** This is due to gas accumulation

** This is due to gas accumulation

* Ante-mortem rupture usually has haemorrhage associated with edges of lesion.

* Ante-mortem rupture usually has haemorrhage associated with edges of lesion.