My parents dog has a non-cancerous tumor on her leg that she has scratched open before. Besides the time she scratched it open and it took FOREVER to heal so we had to keep antibiotics around in case it got infected, it doesn't seem to bother her BUT I am afraid of it growing larger and her scratching it open again.

The vet says they can't remove it because she also has a heart murmur so they can't put her under for surgery. Can they not do it through topical anesthetic? I feel like yeah it'd be uncomfortable and a little painful for her, but the vet said they wouldn't do it. What do you think? She is a 13 year old beagle. Should I just leave it be or find a vet who can remove it with topical anesthetic?