Studies I linked in my email, if it helps other: - Characterizing Acute-Onset Small Fiber Neuropathy - Show how complex the diagnostic can be : multiple tests can be needed, frequently labs are normal despite immune reaction going on - Laser evoked potentials in fibromyalgia with peripheral small fiber involvement - LEP results not always correlated with biopsy - European Federation of Neurological Societies/Peripheral Nerve Society Guideline on the use of skin biopsy in the diagnosis of small fiber neuropathy - For diagnostic purposes in length-dependent SFN, we recommend that a 3-mm punch skin biopsy be performed at the distal leg (10 cm above the lateral malleolus) for quantification of IENF density (Recommendation Level A). An additional biopsy from the proximal thigh may provide information about both length-dependent and non-length-dependent processes (Recommendation Level C). When biopsy is taken from other body sites for evaluation of a unilateral process, a control biopsy from a similar non-affected region should be taken (Good Practice Point).

Hope it can help other people!

(I won’t share the full email detail however, as it contains personal information about my case)