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Related Experiment Videos

An unusual pathologic feature associated with dermatomyositis.

Jacinda B Sampson1, Steven S Chin, Frederic C Clayton

  • 1Department of Neurology, University of Utah, Salt Lake City, UT, USA. jacinda.sampson@hsc.utah.edu

Neuromuscular Disorders : NMD
|May 16, 2006
PubMed
Summary
This summary is machine-generated.

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Juvenile dermatomyositis can present with unusual muscle biopsy findings, including significant glycogen accumulation. This finding, resembling glycogen storage diseases, may complicate diagnosis.

Area of Science:

  • Pediatric Rheumatology
  • Neuropathology
  • Muscle Histopathology

Background:

  • Juvenile dermatomyositis (JDM) is an idiopathic inflammatory myopathy affecting children.
  • Diagnosis typically relies on clinical presentation, autoantibodies, and muscle biopsy findings.
  • Reticulotubular aggregates in endothelial cells are a characteristic electron microscopy finding in JDM.

Observation:

  • A case of JDM presented with clinical features consistent with the disease.
  • Muscle biopsy revealed extensive glycogen accumulation, mimicking glycogen storage diseases.
  • Electron microscopy confirmed reticulotubular aggregates in endothelial cells.

Findings:

  • The muscle biopsy demonstrated glycogen accumulation to an unprecedented degree in a JDM case.

Related Experiment Videos

  • This significant glycogen accumulation could be mistaken for a primary metabolic myopathy.
  • Electron microscopy provided definitive diagnosis by identifying characteristic ultrastructural changes.

    • Implications:

    • Histopathologic findings in JDM can be complex and require careful interpretation.
    • Awareness of potential glycogen accumulation is crucial for accurate diagnosis of JDM.
    • This case highlights the importance of integrating multiple diagnostic modalities in pediatric myopathies.