Bone cancer in dogs, also known as osteosarcoma, is a condition that results in an abnormal, malignant growth of immature bone cells. It's an extremely deadly and aggressive form of cancer that can ...

As with dogs, osteosarcoma is the most common primary bone cancer in humans. And, like dogs, it can occur in any bone but is more likely to form in the long bones of the legs. In January 2025, OST ...

Rebhun said some dogs, particularly large and giant breeds, can develop bone or joint tumors in their legs. These tumors can make it more difficult for dogs to get up and move around.