The incidence of feline injection site sarcomas in the United Kingdom. 

Low rate of feline injection sarcoma in the UK

Source: R.S. Dean, D.U. Pfeiffer, V.J. Adams 
Veterinary Research vol 9 no 17, January 2013 doi:10.1186/1746-6148-9-17.

Cats can suffer from feline injection site sarcoma, which is a skin tumour at an injection site that could be linked to vaccination. It may, however, be linked to other types of injections. This type of sarcoma has been studied in North America where the number of cases has been estimated at between  1 per 1,000 to 1 per 10,000 vaccinated cats. 

This study reviews  vet practice records in the uk during 2007. In that year there were 177 cases of feline injection site sarcoma reported by 414 vet practices taking part in this study. The pharmaceutical industry estimates that 3,607,510 cat vaccine doses were bought by vet practices in that year. This gives an estimated number of cases in the UK in 2007 of from 1 per 5,000 and 1 per 12,500 feline vaccinations, figures that are in line with North American estimates. Feline injection site sarcoma appears to be uncommon  in the UK.