[RedFawnRising]

Oh, I'm sorry for your puppy. most of the time the tumour are healed but you have to
observe some other symptoms.
I mean, look that if you pup is eating and drinking properly? If not, this is not good.
Don't waste time and start proper treatment.

Um, they said they already have an appt for surgery, the soonest available.

Good luck with your pup, OP.

There are all sorts of conditions like this that turn out to be benign, so try not to cross that worry bridge before necessary. I know, easier said than done, but try.