Yet another reason to ask for the repeat skin biopsy...I know you're likely tired of hearing me say this...LOL The first was not conclusive, not handled/transported properly (according to you), and they only did ONE site and NO morphology. There is NO way to determine length or non-length dependent SFN unless they test more then one site. Your wide-spread symptoms would point more toward non-length dependent, but then again, they will never know because they one tested one place. And, as in my case, it wasn't so much the nerve density that was initially the problem (but later density dropped), but the condition of the fibers itself. This is where the morphology comes into play and is so important. You could have damaged, swollen, segmented, etc., fibers...even with a normal density %.

So ask them to do another skin biopsy. As Glenn said, the EMG/NCS CANNOT tell you anything about SFN. But you can have more then one problem.