Changes

*Extension of infection from myocardium; rare.

*Extension of infection from myocardium; rare.

*Traumatic penetration of the pericardium;  

*Traumatic penetration of the pericardium;  

**Foreign bodies from the oesophagus or reticulum in cattle; [[Forestomach_-_Inflammation#Traumatic_Reticulitis|traumatic reticulo-peritonitis]].

**Foreign bodies from the oesophagus or reticulum in cattle; [[Forestomach Inflammation - Pathology#Traumatic_Reticulitis|traumatic reticulo-peritonitis]].

**Fractured ribs; E.g. RTAs in small animals, horses etc.

**Fractured ribs; E.g. RTAs in small animals, horses etc.