--from at least 200 known causes, plus there are many "idiopathic", or syndromes from unknown causes, that it's really hard to say without a lot more information.

Come on over to the peripheral neuropathy forum--

http://neurotalk.psychcentral.com/forumdisplay.php?f=20

--if you haven't already, and give us a detailed description of how this all came on for your husband, what kind of doctors he's seen, testing he's had, anything you know, really, and with the expertise over there we should be able to help you out.

The fact that you said he's using a walker implies there is either numbness in his extremities, or a balance problem, or problems with the motor nerves, and all can happen with neuropathy, but they can come from very different etiologies, so the history of the problem makes a difference when discussing treatments/prognosis.