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Charcot-Marie-Tooth disease type 4G

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Description

HMSNR is an autosomal recessive progressive complex peripheral neuropathy characterized by onset in the first decade of distal lower limb weakness and muscle atrophy resulting in walking difficulties. Distal impairment of the upper limbs usually occurs later, as does proximal lower limb weakness. There is distal sensory impairment, with pes cavus and areflexia. Laboratory studies suggest that it is a myelinopathy resulting in reduced nerve conduction velocities in the demyelinating range as well as a length-dependent axonopathy (summary by Sevilla et al., 2013). For a discussion of genetic heterogeneity of autosomal recessive hereditary motor and sensory neuropathy, also known as Charcot-Marie-Tooth disease, see CMT4A (214400).

OMIM

  • Mode of Inheritance

  • Autosomal recessive inheritance

VARIANTS

9

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Genes

External Links

  • OMIM

    605285

  • Orphanet

    99953

  • HPO
  • Medgen

    C1854449

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