Hi, Helen:
I'm sorry to learn that you have a reason to be here (a diagnosis of an acoustic neuroma tumor) but I'm glad you discovered this site and these forums.
Please understand that the posters on these forums, including myself, are not physicians and cannot credibly, ethically or legally offer any medical advice. That said, I would suggest you consider consulting another neurologist for a 'second opinion' on your case. If you have a 'known' AN, albeit a small one, it may well be the cause of your current discomfort...or it could be the spinal disc giving you the problem. Just because one doctor dismisses your AN as 'of no significance' doesn't mean his opinion is necessarily correct. Facial numbness and 'tingling' are usually a sign of nerve damage or disturbance and need to be addressed, whatever the cause. Your 'mission' now is to locate and verify the cause so that it may be addressed in whatever manner is necessary and feasible.
I wish you all the best and hope you'll drop back to keep us informed.
Jim