I could be wrong but I think all mast cell tumors are cancer. There are different grades (grade 1 being the the least cancerous to grade 4 being the worst) Chance had a grade 1 mast cell tumor removed from the back of his leg (including lymph node) when he was around 3 years old. The first time they did not get good margines so he had to go back under for them to take more of the surrounding tissue. He is doing fine now (he is now 5 1/2 years old) and I always just check him over to make sure I do not find anymore bumps. Don't apologize, your not being a pain. You are a concerned mom who wants the best for your little guy. That's what Boxerworld is all about, asking questions, giving info, and most of all, the wonderful support we find on here from each other

It's perfectly normal for you to be scared and upset, at least you got him to the doctors and after tomorrow you won't have to worry about that nasty little tumor anymore. I will keep you both in prayers and hope for a speedy recovery for Austin. Let us know how he does tomorrow, i'll be thinking about him!!!!