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[Distal myopathies].

I Pénisson-Besnier1

  • 1Département de Neurologie, Hôpital Larrey, Centre Hospitalier Universitaire d'Angers, 4 rue Larrey, 49033 Angers cedex 01. ispenisson-besnier@chu-angers.fr

Revue Neurologique
|March 23, 2004
PubMed
Summary

Distal myopathies are genetic muscle disorders affecting the hands and feet. This research identifies five types, detailing their genetic causes, inheritance patterns, and clinical features.

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Area of Science:

  • Neurology
  • Genetics
  • Pathology

Context:

  • Distal myopathies are a group of inherited muscle disorders.
  • Characterized by progressive weakness and atrophy in distal muscles (hands/feet).
  • Pathological hallmarks include myopathic changes in skeletal muscles.

Purpose:

  • To classify and describe five distinct distal myopathies.
  • To identify the causative genes and mutations for four recently defined types.
  • To differentiate these myopathies based on onset, inheritance, and affected muscle groups.

Summary:

  • Five distal myopathies are identified: Laing (MYH7), Nonaka (GNE), Miyoshi (dysferlin), Welander (chromosome 2p), and Udd/Markesbery-Griggs (titin).
  • Classification considers age of onset, inheritance (autosomal dominant/recessive), and initial muscle involvement.
  • Most exhibit normal/mildly elevated creatine kinase levels and rimmed vacuoles, except Miyoshi myopathy.

Impact:

  • Provides a clear classification of distal myopathies based on genetic and clinical factors.
  • Facilitates accurate diagnosis and genetic counseling for affected individuals.
  • Contributes to understanding the genetic basis of muscle diseases.

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