Successful and less costly vet treatment fi you have regular vet examinations per year and daily home check up.
I note that some old male not neutered dogs develop circum-anal tumours after the age of 10 years. One small Maltese owner took the risk to get the circum anal tumours excised by me when the dog was already 15 years old. It is best not to wait till the tumours become gigantic as there is no skin to stitch up. A lot of bleeding. Bandaging the big wound is not practical. A dog more than 10 years old is also in poor health.