@katec, I have idiopathic small fiber PN and my cousin also has small fiber PN but we have not had any tests to determine if it's a genetic form of neuropathy.

Here is some information that discusses the genetics of small fiber neuropathy.
— https://ghr.nlm.nih.gov/condition/small-fiber-neuropathy

My brother had neuropathy, but I am 99% sure it was due to diabetes.

No-one else in my family has been diagnosed with SFN, as of yet, let alone ever heard of it! My father has diabetic neuropathy.

My father had it, though it was never diagnosed. I think that all of my five siblings have been treated for pn, apparently with better success than I. I had a bunch of tests done at Oregon Health Sciences University a year ago, and they told me that I had some genetic markers, indicating that it's our father's fault.

Jim

@katec No one in my family has/had neuropathy. Never even heard of it before I got it. Lori Renee

I did have the genetic testing done, all proved ok.