You need a new doctor. They should have told you how big it is because that can dictate the treatment. You also need to be getting not just second opinions but lots of opinions because there will be multiple approaches for any treatment option--if surgery, what path will they take. If radiation, what type, there are three choices. Find a good ENT who can run all of the tests (you'll need to read this website to see what can be learned), and wherever you get it treated, make sure they have lots of experience--hundreds or thousands of surgeries, and if it is radiation (surgery as well), your best bet is to find centers that are set up to treat acoustic neuromas. For starters, check out Stanford, Pittsburgh, U. Virginia, and there are a number in NY. This site will have information on all of them. Once you decide surgery or radiation, go to the best place you can (insurance will determine), and if it is watch and wait, this is where a good ENT comes in who will test you every time you visit to follow hearing changes.