- benign tumour of dogs
- may grow to considerable size
- - the size of the lesion giving rise to clinical signs is compounded by haemorrhage from and into the tumour
- - thus, a large mass of apple size may be found protruding from the spleen and adherent to the omentum
- on section, it is largely blood clot
- responds well to surgery
- - therefore it must be distinguished from haemangiosarcoma