I am sorry that your husband is dealing with balance issues on top of everything else. I have a long history with balance problems that pre date cancer. Many balance issues can derive from excess fluid in the inner ear which is where our vestibular system is located that sends messages to the brain about our position. In the case of excess fluid in the inner ear, there is not a problem with the brain as the brain is reacting properly to the signals it is receiving. But the signals themselves are wrong due to excess fluid pressure. In my situation, I would experience extreme vertigo with the room spinning. Other balance problems can result from normal crystals that exist in the inner ear getting loose and floating into a position where they constantly stimulate the wrong section of the vestibular nerve. This also tends to result in vertigo rather than mild imbalance and is called BPPV. There are simple maneuvers that can be done to move the crystals away from the vestibular nerve. In any event, you might want to check with an ear, nose, throat doctor as this may have nothing to do with cancer and cancer is what your current doctors are focused on. A good ENT may be able to work from the scans you've already had done. I have no information as to whether any imbalane is due to any medications he may be on.
I hope this is of some help to you both.
Cheers,
Maggie
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