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Related Experiment Videos

Autosomal recessive distal dystrophy.

R J Barohn1, R G Miller, R C Griggs

  • 1Department of Medicine, University of Texas Health Science Center, San Antonio 78284.

Neurology
|September 1, 1991
PubMed
Summary
This summary is machine-generated.

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Miyoshi myopathy, a rare autosomal recessive distal muscular dystrophy, presents with selective gastrocnemius muscle involvement and significantly elevated creatine kinase levels. Early asymptomatic creatine kinase elevation precedes weakness, aiding in distinguishing it from other distal muscular dystrophies.

Area of Science:

  • Neurology
  • Genetics
  • Muscle Diseases

Background:

  • Miyoshi myopathy is an autosomal recessive distal muscular dystrophy.
  • Characterized by selective involvement of distal muscles, particularly the gastrocnemius.
  • Distinctive clinical and laboratory features are crucial for diagnosis.

Observation:

  • Five new cases of Miyoshi myopathy were identified.
  • Symptoms onset between ages 15-25.
  • Elevated creatine kinase levels (>10x normal) and specific EMG findings (abundant brief motor units, fibrillations) were noted.
  • Dystrophic changes, without vacuoles, were prominent in the biceps femoris.

Findings:

  • Asymptomatic creatine kinase elevation can precede clinical weakness by years.

Related Experiment Videos

  • Autosomal recessive inheritance pattern confirmed.
  • Miyoshi myopathy exhibits unique features differentiating it from other distal muscular dystrophies.

    • Implications:

    • Proposes a new classification for distal muscular dystrophies.
    • Highlights the importance of early creatine kinase monitoring in at-risk individuals.
    • Enhances understanding of the genetic and clinical spectrum of Miyoshi myopathy.