Newbie With PN and Elevated IgM

All,

It’s been a fun year…NOT

A recent test revealed I have a MAG IgM titer level of 1:3200 which listed the following test criteria:

Normal: <1600
Moderately Elevated: <3200
Highly Elevated: >6400

I’ve been having sensory PN since early march – started in the legs and moved upward. Feet now frequently have mild to moderate burning feeling – lower legs sometimes. Skin sensitivity all over is diminished.
hands don’t burn but have lost a noticeable amount of sensitivity.
Face, back etc also have diminished sensitivity. My motor ability does not appear to be noticeable impaired – perhaps a tiny bit, hard to say for sure.

Additional testing made multiple myeloma unlikely (although no bone biopsy).

I have a MRI of my lower back with contrast scheduled next week – don’t expect structural problems. Perhaps inflammation.

Also I had prostatectomy in march and I’m currently receiving radiation as an adjuvant therapy

My next neurologist appointment is in 1 1/2 weeks.

I’d like to pose a few question to anyone – I’m very new at this…

What should I ask my doc?
Is a titer of 3200 fairly conclusive as the source of my PN?
Should I have a nerve biospy? What will it tell me?
Where might CIDP fit into the equation?

ANY help is appreciated!

java_joe