A quick search revealed that SENSORY
GANGLIONOPATHY is an autoimmune disorder,
meaning that your wife's immune system is
actually attacking itself. It seems that
the treatment for her condition is not
officially defined, and has had mixed
results.
I found a discussion paper on the
condition, as related to Sjögren’s
syndrome, which might help:
http://jnnp.bmj.co
m/cgi/content/full/77/8/967
"Therapeutic response to intravenous
immunoglobulin (Ig) may involve
immunomodulation, lessening the toxic
effects of infiltrating cells. During
painful sensory neuropathy, we suspect
that the lesion responsible is also within
the sensory ganglion, with cell
inflammation affecting small neurones
rather than large ones as in sensory
ataxic form."