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===Description===

===Description===

Pericardio-Peritoneo-Diaphragmatic Hernia (PPDH) is a congenital abnormality characterised by incomplete formation of the embryological transverse septum, meaning that the peritoneal and pericardial cavities remain continuous.  Since the diaphragm (formed by the transverse septum) does not separate the two cavities, abdominal organs are able to move into the pericardial sac.  The defect may occur more commonly in the Weimaraner breed of dog and in Himalayan and Domestic Long Hair cats.  It is often accompanied by other congenital defects, such as umbilical hernias, sternal malformations, cardiac septal defects and pulmonary vascular anomalies.  Many animals are diagnosed as adults and show few clinical signs on presentation.  

Pericardio-Peritoneo-Diaphragmatic Hernia (PPDH) is a congenital abnormality characterised by incomplete formation of the septum transversum during early embryonic development, meaning that the peritoneal cavity and pericardial sac remain continuous in later life.  The defect may also result from a failure of the septum transversum to fuse with the pleuroperitoneal folds.  Since the diaphragm (which is formed by the septum transversum) does not separate the two cavities, abdominal organs are able to move into the pericardial sac.  The defect may occur more commonly in the Weimaraner breed of dog and in Himalayan and Domestic Long Hair cats and it is often accompanied by other congenital defects, such as umbilical hernias, sternal malformations, cardiac septal defects and pulmonary vascular anomalies.  Many animals are diagnosed as adults and show few clinical signs on presentation.  

===Diagnosis===

===Diagnosis===

====Clinical Signs====

====Clinical Signs====

*The disease is frequently asymptomatic.

*The disease is frequently asymptomatic.

*Gastro-intentinal signs may be reported, including vomiting, diarrhoea, abdominal pain, anorexia and weight loss.

*'''Gastro-intentinal signs''' may be reported, including vomiting, diarrhoea, abdominal pain, anorexia and weight loss.

*Respiratory distress may occur if abdominal contents occupy a large amount of volume of the thoracic cavity.

*'''Respiratory distress''' may occur if abdominal contents occupy a large amount of volume of the thoracic cavity.

*Cardiac signs are unusual but cardiac tamponade (with right-sided heart failure) may develop if abdominal organs are incarcerated in the pericardial sac.  The heart sounds will be muffled on auscultation and borborygmi may be apparent.

*'''Cardiac signs''' are unusual but cardiac tamponade (with right-sided heart failure) may develop if abdominal organs are incarcerated in the pericardial sac.  The heart sounds will be muffled on auscultation and borborygmi may be apparent.

====Radiography====

====Radiography====