If you remember my last post (which I almost do) it was about a lump Benny had on his head above his right eye. A month after the vet removed that and a tooth the lump came back. The vet was very concerned since it should have been permanently removed, so he prescribed another 10 days of antibiotic and it worked like a charm.
Perhaps there was a bit of infection left the first time, who knows, but the big guy is doing fine now. Too bad there's no cure for old age. He's 15 and that can't be treated.