How quickly does bone cancer in dogs progress? In the axial skeleton the tumor does not grow rapidly as do the appendicular tumors, thus leading to a more insidious course of disease. The tumor may be there for as long as two years before it is formally diagnosed.
When a dog has bone cancer What can I expect? Signs & Symptoms of Osteosarcoma in Dogs
Swelling or a mass; this is often the first sign of a tumor in the skull, jaw, or ribs. Difficulty eating if a tumor affects the jaw. Neurologic signs, such as seizures or a wobbly gait, with the skull or spinal/vertebral tumors. Breathing difficulties or lameness with rib
Where does bone cancer spread in dogs? Osteosarcoma commonly affects the limbs of dogs but can also occur in other parts of the body (skull, ribs, vertebrae, pelvis). It happens in smaller dogs but much less commonly than in larger breed dogs. In about 80 percent of patients, the cancer will spread to the lungs.
Are dogs with bone cancer in pain? What are the signs of osteosarcoma? Osteosarcoma is very painful. If your dog has an osteosarcoma of the limb (appendicular osteosarcoma), lameness or a distinct swelling may be noted. Your dog may be more lethargic, have loss of appetite, and be reluctant to walk or play due to pain caused by the tumor on the bone.