More evidence of chip-related cancers in pets…
From Veterinary Dermatology 2011 May
Department of Histopathology, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy.
A 9-year-old, neutered male cat was presented for a subcutaneous mass on the neck. After surgical removal of the mass, a pet identification microchip was found within the tumor. Histological examination of the mass revealed typical features of the feline postinjection sarcoma. The cat had never received injections at the tumor site; all routine vaccinations were administered in the hindlimbs. Few cases of sarcomas developing at the site of microchip application have been reported in animals, although the contributory role of vaccine administrations has not been ruled out.
This is the first report of a microchip-associated fibrosarcoma in a cat. Adherence to American Association of Feline Practitioners vaccination guidelines, avoiding the interscapular area, enabled confirmation of the definitive aetiology of the neoplasia.
For more on the dangers of microchips, read this post: Microchips: Are Pet Owners Being Misled?