Injection-site Sarcomas in Cats

An injection-site sarcoma is a tumor of the connective tissues in the cat.These tumors are often called fibrosarcomas, and are most frequently located between the shoulder blades, in the hip region, and in the back legs. Theyare most often associated with inactive killed rabies or feline leukemia vaccines, or with multiple vaccines given at the same time, but they can also be caused by other injections such as steroids. They have even been associated with microchips. The incidence of these tu...