Bone And joint Cancers In Dogs And Cats

Bone and joint cancers are most commonly seen in dogs, with osteosarcoma being the leading type, especially in large and giant breeds. Osteosarcoma is highly aggressive, typically affecting the long bones of the limbs, and has a strong tendency to metastasise early, usually to the lungs. 
These tumours are less common in cats, but when they occur, they may behave aggressively as well. Other cancers affecting the skeletal system include chondrosarcoma, fibrosarcoma, hemangiosarcoma, and metastatic cancers that spread to bone from other primary sites.

These tumours are extremely painful and can cause lameness and reduced mobility, often presenting as a sudden or progressive limp. Because musculoskeletal tumours are usually advanced at the time of diagnosis, accurate staging is critical to determine whether aggressive local therapy, like surgery or radiation is appropriate, and to evaluate for metastatic disease.

The typical signs of bone and joint cancers in pets include:

• Persistent or progressive lameness.
• Localised swelling over a limb or joint.
• Pain on palpation, reluctance to move, or reduced weight-bearing.
• Pathological fractures due to weakened bone structure.

Diagnosis usually begins with radiographs, which may show bone lysis or proliferation, but cannot reliably distinguish tumour type. A biopsy or fine needle aspirate is required for definitive diagnosis. Conventional staging with chest radiographs and abdominal ultrasound is standard, but these may miss small or metabolically active metastases.

PET-CT combines metabolic imaging with high-resolution anatomical detail. These cancers are highly aggressive, and knowing the true extent of the disease is key to planning treatment. The benefits of PET-CT scan include:

• Identifying microscopic or metabolically active lung or bone metastases before they are visible on X-rays or CT.
• Provides a whole-body survey for additional lesions, ruling out systemic spread before committing to surgery or limb amputation.
• Differentiates viable tumour tissue from post-biopsy inflammation or reactive bone, helping define the true extent of disease.
• Pinpoints metabolically active tumour margins for precise radiation targeting.
• Allows oncologists to evaluate chemotherapy or radiation response after only a few treatments, guiding adjustments in therapy

Bone and joint cancers have an aggressive biology. The PET Theranostics PET-CT scan capability is the most effective method of understanding the cancer’s behaviour and formulating treatment plans. We are accepting currently accepting referrals. Pet owners should discuss a PET-CT scan with their primary vet or vet specialist. Contact us today.