My Wife Has Lost The Use Of Both Hands And

My wife has lost the use of both hands and her balance is off. This started in November and has become worse. Doctors are scaring her with possibility of MS. but have yet to give a definitive diagnosis. We also told them 10 years ago she has a cervical spine fusion of 3 discs in her neck. Could that be the reason her hands are so bad? They keep pointing out her "gate" and reflexes indicate neurological. Waiting on second view of CT Scan does not appear to have lesions. I still think someone should look at her neck. What say you? Please advise.