Primary vertebral hemangiosarcoma in a dog.

A 7-year-old spayed Cocker Spaniel was evaluated for recurrent hind limb paraplegia. Radiography and myelography revealed a compression fracture of T-9 secondary to a lytic process. Findings at necropsy and histologic and immunohistochemical examinations revealed 3 sites of hemangiosarcoma in each of the bodies of T-9 to T-11. Primary vertebral hemangiosarcoma is rare, and in this dog may have represented a multicentric occurrence or a primary neoplasm with adjacent metastatic foci.