Osteosarcoma The most common type of primary bone cancer in dogs, accounting for up to 85 % of tumors that originate in the skeletal system. (caninecancer.com)
Canine osteosarcoma (cOSA), the most common primary bone cancer in dogs, is a highly aggressive tumor with an estimated spread (or metastasis) rate of approximately 90 %. (agsdcf.com)