Fig. 3From: Arthropathy-related pain in a patient with congenital impairment of pain sensation due to hereditary sensory and autonomic neuropathy type II with a rare mutation in the WNK1/HSN2 gene: a case reportSural nerve biopsy viewed under light microscopy of the epon section with toluidine blue staining. Light microscopy findings (a) Low-power image, b High-power imageBack to article page