What you need to know about these indolent tumors.
“Hemangiosarcoma is extremely indolent, so clinical signs are usually not evident until the advanced stage when metastasis has occurred. The tumors at this stage are largely resistant to chemotherapy, and standard-of-care (surgery and intensive chemotherapy) provides a median survival of little more than six months. Morbidity and mortality are usually due to acute internal hemorrhage secondary to tumor rupture.”
-Johnny D. Hoskins, DVM, PhD, DACVIM