Feline injection-site sarcoma
Also known as: Vaccine-associated sarcoma
Feline injection-site sarcoma is an aggressive malignant tumor (most often a fibrosarcoma) that develops at sites where injections, particularly certain vaccines, have been given. Chronic local inflammation is thought to trigger malignant transformation. The tumor is locally invasive and tends to recur after surgery, requiring wide excision and often additional therapy.
Quick facts
- Type:
- Neoplasia
- Typical onset:
- Chronic
- Body systems:
- Musculoskeletal, Integumentary
- Affected species:
- CAT
Sources & references
- Merck Veterinary Manual — Describes feline injection-site sarcoma, its link to injection-site inflammation and aggressive local behavior.
- AAHA — Discusses injection-site sarcoma risk and recommendations for vaccine selection and site placement in cats.
This content is for educational purposes and is not a substitute for professional veterinary advice. If you are worried about your pet, contact your veterinarian.