Changes

==Description==

==Description==

A highly malignant tumour of vascular endothelial origin. Commonly affect dogs and the most frequently affected areas are the spleen, pericardium, right atrium, liver and muscle.  The cat is affected less frequently and the most common sites are the liver, spleen and mesentry. Metastasis occurs via the haematogenous route or via rupture and transabdominal spread.  Metastatic sites include, lungs, liver, omentum and diaphragm. Surgery is the treatment of choice but even with this survival time remains very short.

A highly malignant tumour of vascular endothelial origin. Commonly affect dogs and the most frequently affected areas are the spleen, pericardium, right atrium, liver and muscle.  The cat is affected less frequently and the most common sites are the liver, spleen and mesentry. Metastasis occurs via the haematogenous route or via rupture and transabdominal spread.  Metastatic sites include, lungs, liver, omentum, diaphragm and less commonly brain. Surgery is the treatment of choice but even with this survival time remains very short.

==Signalment==

==Signalment==