Hereditary motor and sensory neuropathy type 2C is genetically distinct from types 2B and 2D

Masaaki Nagamatsu, Robert B. Jenkins, Daniel J. Schaid, Diane M. Klein, Peter James Dyck

Research output: Contribution to journalArticle

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Background: Linkage analysis studies have identified 3 genetically different varieties of hereditary motor and sensory neuropathy type 2 (HMSN 2, also called Charcot-Marie-Tooth disease type 2, or CMT 2): HMSN 2A (linked to Ip35-p36), 2B (to 3q13-q22), and 2D (to 7p14). Hereditary motor and sensory neuropathy type 2C is characterized by diaphragmatic and vocal cord paresis; its disease locus has not been mapped. Objective: To determine whether the HMSN 2C phenotype, previously shown not to be linked to the HMSN 2A locus, is linked to the HMSN 2B or HMSN 2D loci. Design: Linkage analysis. Setting and Patients: Thirty-three subjects, including 12 affected individuals and 11 individuals at risk, in a large family with HMSN 2C. Results: Evidence was found against linkage of HMSN 2C phenotype to either the HMSN 2B or the 2D loci. Conclusions: HMSN 2C is genetically distinct from HMSN 2A, 2B, and 2D. We think that at least 4 genetically distinct varieties of autosomal dominant HMSN 2 exist.

Original languageEnglish (US)
Pages (from-to)669-672
Number of pages4
JournalArchives of neurology
Issue number5
StatePublished - May 2000


ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Clinical Neurology

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