I do not want to scare you, but if a local reaction site is still present 10 weeks later then it is time to remove it. It is probably a local reaction, but it could be the early stage of a sarcoma. It is best to remove it now and find out for sure what is causing the problem. Even though I was the one to report a sarcoma, other vets have also seen this problem. Fortunately it is still a rare condition. Hope that hepls, Jerry Murray, DVM [Posted in FML issue 3462]