I don't think you have anything to worry about with flying. This type is a very slow growing tumor. Chances are you have had yours for years and it was never noticed. If you are concerned, call your doctor and ask about flying. I'm sure he/she will be able to put your fears to rest. At the time mine was found I had flown across country and a couple of other trips within the US. I had no symptoms and when it was finally found, the doctor told me that just a little bit longer and I would have had a stroke. It was nearly the size of your fist.