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Hemangiosarcoma in Dogs

Jul 26, 2018

The most common tumor of the spleen in dogs is hemangiosarcoma (HSA). Up to 50% of dogs with splenic HSA are in DIC (disseminated intravascular coagulation, or inability to clot blood) at the time of presentation. Unfortunately, with surgery alone, the average survival times are only around 3 months. Liver biopsy is essential to differentiate between liver metastasis (spread) and benign hyperplasia (increased tissue growth).  HSA does not always start in the liver or spleen; it can also start in the skin, subcutaneous tissue, or the heart. Stage I cutaneous HSA may be cured with aggressive surgical resection. Radiographs (x-rays) of the lungs are required to rule out pulmonary metastasis (tumors in the lungs). Cardiac HSA is a common cause of pericardial effusion (fluid surrounding the heart) in dogs. HSA in cats is rare but occurs most commonly within the abdomen (spleen, liver or kidneys) or subcutaneous tissue (under the skin)