CANINE SPLENIC HEMANGIOSARCOMA WITH ABDOMINAL DISSEMINATION

Disseminated hemangiosarcoma was encountered in a 12-year-old female M altese dog. Tumor tissues were dispersed on the serosal surface of the liver, kidney, digestive tract, omentum and diaphragm. Metastatic les ions were not observed in the parenchyma of the lung and heart. The sp leen was enlarged with rupture at the anterior region of the hilus. Th e disseminated protruding tumor masses could be easily peeled off from the organ surfaces. The tumor cells were round or spindle in shape, w ith hyperchromatic nuclei containing prominent nucleoli. Various-sized vascular spaces containing erythrocytes and serum could be identified in this tumor. This case was diagnosed as hemangiosarcoma originating from the spleen with abdominal dissemination.