I got back the results of my skin biopsies and they were negative. The neurologist was convinced I had SFN, but asked if I wanted to confirm the diagnosis.

Since the skin biopsies were negative as well as the EMG being negative, he has now changed his diagnosis to post viral syndrome. I am now on an antiviral medication for a month to see if I improve.

Can there be a possibility that the skin biopsy produced a false negative? I’m wondering if the result would be different from a different area.