Canine Bone Cancer



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This portion of the website is devoted to canine cancer. These are graphic images of the canid. Please be aware of this as you visit this portion of the site.

Bone Cancer: Osteosarcoma



Osteosarcoma is the most common primary bone tumor in dogs. Osteosarcom accounts for 85% of all the bone tumors that occur in limbs of dogs and also occurs in the spine, jaw, skull and ribs. Repetitive bone injury, previous fractures, underlying bone disease, viral infections, genetic predisposition and previous radiation may or may not lead to osteosarcoma. It usually occurs in large and giant breeds. It usually occurs in dogs from 1 to 2 years of age or dogs between 7 and 9 years of age. The cancer develops deep in the bone, destroying the bone from the inside out. Contributing factors also include rapid growth in large breed dogs, male dogs are more likely to have osteosarcoma than females, having metallic plates for bone repair, and early spay or neuter. Symptoms include lameness, swelling, and pain.

The standard treatment for Osteosarcoma is amputation, replacement of the affected bone with a metal implant, chemosurgery, and radiation. Survival rates are averaging one year or less.

Bone Cancer: Chondrosarcoma



Chondrosarcoma is a cartilage tumor. It is not as malignant as Osteosarcoma. This is the second most common bone cancer. It appears on flat bones such as ribs or skull bones, but can occur in the limbs, usually the thigh bone. Symptoms are similar to Osteosarcoma. Surgery is the primary form of treatment. Chemotherapy is ineffective. Recent studies suggest that a specific type of antibiotic, called "fluoroquinolone" may be toxic to the cartilage cancer cells. Further studies are needed to see whether this antibiotic will have a role in treatment of this type of cancer.*

*FDA fluoroquinolones should be reserved for these conditions only when there are no other options available due to potentially permanent, disabling side effects occurring together.



Bone Cancer: Fibrosarcoma



Fibrosarcoma occurs primarily in the jaw bones, facial bones, ribs and vertebrae, but it can occur in the limbs. There are two types of Fibrosarcoma which are central and parosteal. Surgical resection, amputation and limb salvage are the main treatment options. (see oral cancer page)

Bone Cancer: Hemangiosarcoma



Hemangiosarcoma is rare. It occurs mainly in young dogs and presents in the limbs and axial skeleton. There is a high incidence of metastases. Surgerical removal of the limbs and chemotherapy with doxorbicin are the accepted treatments.

Bone Cancer: Multilobular Osteochondrosarcoma



Multilobular Osteochondrosarcoma develops off the lining of the bone, usually involving the skull. It can also include the The skull is most commonly involved, but pelvis, ribs and hard palate can also be involved. Symptoms depend on the location of the tumor. Treatment includes surgical resection and radiation. Location of the tumor, histology of the tumor and evaluation of the surgical margins are important for prognosis and risk of recurrence or metastasis.

Bone Cancer: Primary Joint Tumors




Epithelioid and spindle synovial cell sarcomas develop from the cells in joints, bursae and tendon sheaths. Other types of joint tumors include histiocytic sarcoma and malignant fibrous histiocytoma, synovial myxoma and myxosarcoma, OSA, FSA, CSA, HSA, liposarcoma, rhabdomyosarcoma, and undifferentiated sarcoma. Symptoms include lameness, pain or swelling around the joint. Amputation is the recommended treatment. Radiation and chemotherapy are not effective.



If there are any cancers we have not covered let us know.

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