Mike, I saw your post and really feel I can give you some insight. If you had an approach other than trans-lab, it sounds to me like the surgeons may not have gotten all of the balance fibers cut when they did your surgery. From what I understand, the nerves are fairly discrete within the internal canal, but the auditory and balance nerves become harder to distinguish from one another closer to the brain. This means that occassionally the surgeon will mistake a balance fiber for a hearing fiber and leave it behind. This leaves you with conflicting input from each side of your head. Believe me, I've been there. I had a similar experience after radiation treatment. William Hitselberger at House Clinic in LA is known for "Hitsleberger's Rule" which basically comes down to erring on the side of cutting all the balance function because a patient with a little hearing loss but no dizziness will be the happy patient. One thing that I would definitely do is to get gentimicin injections into your tumor side ear. A series of these will kill off the remaining vestibular (balance) function on that side. Talk to an ENT about that. I hope this helps. - Jack