Willow got her stitches out today!

[PlutosHeart]

3. Good news.

My belief after having many pets having masses removed is that even the surgery itself can spread the cells. They say it is clean but generally not all the time. So what you might consider is a quality non-toxic diet and any supplements of a natural composition to support her "immune system". This means water also that is filtered but still with its minerals intact.
BTW I have gained 2-4 additional years on pets from focused care that were diagnosed terminal. Not saying yours is but just offering my experience. Have had about 16 rescued dogs and also cats.