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Late‐onset hereditary sensory and autonomic neuropathy expands the phenotypic spectrum of MFN2 ‐related diseases
Author(s) -
Wu Rui,
Fu Jun,
Meng Lingchao,
Lv He,
Wang Zhaoxia,
Yuan Yun
Publication year - 2018
Publication title -
neuropathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.701
H-Index - 61
eISSN - 1440-1789
pISSN - 0919-6544
DOI - 10.1111/neup.12487
Subject(s) - sensory neuropathy , mfn2 , sensory system , phenotype , medicine , neuroscience , genetics , biology , gene , mitochondrial fusion , mitochondrial dna
Mutations in the Mitofusin 2 (MFN2) gene have been identified in patients with autosomal dominant axonal motor and sensory neuropathy or Charcot–Marie‐Tooth 2A (CMT2A). Here we describe clinical and pathological changes in an adult patient with sporadic hereditary sensory and autonomic neuropathy (HSAN) due to an MFN2 mutation. The patient was a 53‐year‐old man who had sensory involvement and anhidrosis in all limbs without motor features. The electrophysiological assessment documented severe axonal sensory neuropathy. The sural nerve biopsy confirmed the electrophysiological findings, revealing severe loss of myelinated and unmyelinated fibers with regeneration clusters. Genetic analysis revealed the previously identified mutation c.776 G > A in MFN2 . Our report expands the phenotypic spectrum of MFN2 ‐related diseases. Sequencing of MFN2 should be considered in all patients presenting with late‐onset HSAN.