Hi dreamer - my doctor has given sfn diagnosis with a partially negative biopsy . My ENFD was normal (on the lower end but within normal limits ) but my SGNFD at the thigh was way below normal limits . I also had a QSART which showed reduced swear production at the thigh and a repeat of that which showed the same plus prolonged sweating in my hands . Based on that he diagnosed as sfn . It took my doctor like 2 months to actually contact me with my results but if you already have results then that is a little bit different I suppose . Did you have SGNFD measured ? Also what were you values for the test ? Have you had any other tests that were positive ?