You should seek the advice of your veterinarian if your pet is ill as only he or she can correctly advise on the diagnosis and recommend the treatment that is most appropriate for your pet.

Chondrosarcoma is most common in middle-aged and older cats

Chondrosarcomas are uncommon in cats. They can occur at any age , with reported cases being seen in  cats aged 2-15 years of age (mean 8.8yrs). Signs associated with chondrosarcomas are :

• Rapidly growing firm masses 
• They are attached to the bone
• They are painful to touch
• They cause lameness
• Locations reported include :
  • femur
  • foot
  • humerus
  • pelvis
  • scapula - most frequently reported site.
  • skull
  • tibia

Approximately 10% of these tumours may spread to the lungs.

Treatment involves surgical excision, although radiotherapy or chemotherapy may also be used as adjunct therapy.

The prognosis is guarded, and reported to be less favourable than for osteosarcoma.

References

Schrader S.C. and Sherding R. G. Disorders of the Skeletal System  p1247 in Sherding R.G. Ed  : The Cat - Diseases and Clinical Management (1989) Churchill Livingston 

Turrell J.M. and Pool R.R. Primary bone tumours in the cat. A retrospective study of 15 cats and a literature review. Vet Radiol (1982) 23:152 

Updated January 2016