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A very small number of cats (between 1 in 2,000 and 1 in 10,000) have the potential to develop malignant skin tumors at sites where vaccines were administered. More information about the occurrence of these tumors and guidelines for vaccination and monitoring of cats can be found at the website for the Vaccine-Associated Feline Sarcoma Task Force. These tumors have a very high likelihood of regrowing after conservative surgery, and an unpredictable rate of spread.
Common treatments for vaccine-associated sarcoma may include aggressive surgery, radiotherapy, and/or chemotherapy.
back to the Oncology Service
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