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Tubular aggregate myopathy: a case report.

Na Rae Kim1, Yeon-Lim Suh

  • 1Department of Pathology, Samsung Medical Center, Sungkyunkwan University, School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul 135-710, Korea.

Journal of Korean Medical Science
|February 18, 2003
PubMed
Summary

This study details the first Korean case of primary tubular aggregate myopathy, a genetic muscle disorder causing progressive weakness. Findings reveal characteristic tubular aggregates within muscle fibers, aiding disease understanding.

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Area of Science:

  • Neurology
  • Genetics
  • Pathology

Background:

  • Primary tubular aggregate myopathy (PTAM) is a rare inherited neuromuscular disorder.
  • Characterized by progressive muscle weakness and stiffness, often with a dominant inheritance pattern.

Observation:

  • A 19-year-old Korean male presented with slowly progressive proximal muscle stiffness and weakness.
  • Muscle biopsy revealed subsarcolemmal or central pale basophilic granular vacuoles.
  • Specific staining identified pathological features with modified Gomori's trichrome and nicotinamide adenine dinucleotide-tetrazolium reductase.

Findings:

  • Ultrastructural analysis confirmed aggregates of 60 nm hexagonal tubules in both type 1 and type 2 muscle fibers.
  • These findings are consistent with PTAM, a condition affecting muscle structure.

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Implications:

  • This case expands the geographic and genetic understanding of PTAM.
  • Further research into the pathogenesis, particularly involving the sarcoplasmic reticulum, is warranted.
  • Understanding these ultrastructural characteristics is crucial for accurate diagnosis and potential therapeutic strategies.