Primary Renal Hemangiosarcomas in Two Dogs

Primary renal hemangiosarcomas were treated by nephrectomy in two dogs.The first dog exhibited hematuria associated with a right renal mass, which improved after nephrectomy.The dog died 75 days after surgery with splenic and hepatic metastases.The second dog suffered continuous hematuria due to a large left renal mass, which was treated with nephrectomy followed by carboplatin treatments.Hematuria resolved after surgery.The dog died 197 days after surgery with metastases to both lung and skin.In the both cases, a recurrence at the primary site was not observed during the follow-up period.Nephrectomy is considered effective for the local control of renal hemangiosarcoma in dogs, but post-surgical adjuvant chemotherapy may be necessary to prolong survival.