It is difficult to diagnose over the internet, but it seems like a comprehensive workup has been done. The MRI and CT scans would exclude many of the major problems that can lead to the symptoms.
A neurologist indeed would be the proper specialist to go to. I would consider another opinion at this point, preferably at a major academic medical center.
Hearing and dizziness can be due to a variety of ENT disorders, so if that route hasn't been explored, I would consider it.
These options can be discussed with your personal physician.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
www.kevinmd.com
Have they ruled out epilepsy? It would be kinda unusual to manifest like this, but epilepsy sounds possible to me. Is the hearing loss permanent or is it episodic? You should make sure that he is going to an academic research medical center. The home town hospital won't do in a case like this.
I don't know if they researched Epilepsy. His Hearing loss is episodic. He is also getting numbness in his hands. All of the symptoms come and go but they are getting worse as time progresses. When they leave, he is "normal" for a day or two, but then he forgets about the terrible condition he has been in and tells his GP he is doing great. He is a Dr. himself, so he doesn't want to bounce around and get more opinions (stubborn), but I think that is what he needs. I know they have been to UCSF and are going somewhere else in November, but the clock is ticking. Thanks for the input.
For anyone following this thread - he was diagnosed with MSA (Multiple system atrophy) which has a grim prognosis.
http://en.wikipedia.org/wiki/Multiple_system_atrophy
has he been checked for vit b12 deficiency? just a thought