I would also recommend getting another oncologist's opinion, if for no other reason that you do not seem comfortable with this one. I am not an oncologist but the general recommendation for acanthomatous ameloblastomas is surgery. A CT scan prior to surgery is also recommended in order to be able to better understand the extent of the tumor prior to surgery. This may help plan the surgery to help increase chances for proper margins as well as enhance cosmetic options. I hope this helps.
Christopher A. Lee, D.V.M., C.V.L.S.
Promoting surgical options and pet comfort through the use of lasers.