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Neonatal metabolic myopathies.

I Tein1

  • 1Department of Pediatrics, Hospital for Sick Children, University of Toronto, Ontario, Canada.

Seminars in Perinatology
|May 20, 1999
PubMed
Summary

Neonatal hypotonia and weakness can signal inherited metabolic myopathies. This review focuses on glycogen and lipid metabolism defects presenting in infancy, crucial for early diagnosis and management.

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Area of Science:

  • Biochemistry
  • Genetics
  • Neurology

Background:

  • Neuromuscular diseases in newborns often manifest as hypotonia and weakness.
  • Metabolic myopathies, though sometimes diagnosed later, can present from birth.

Purpose of the Study:

  • To review genetic disorders of glycogen and lipid metabolism causing myopathy.
  • To focus on defects presenting in the neonatal and early infancy periods.

Main Methods:

  • Literature review of genetic disorders affecting glycogen and lipid metabolism.
  • Focus on clinical presentations in the neonatal and early infancy stages.

Main Results:

  • Metabolic myopathies can cause progressive weakness, exercise intolerance, or myoglobinuria.
  • Glycogenoses and fatty acid oxidation defects are key examples presenting early.
  • Myoglobinuria in infancy may occur during catabolic crises in fatty acid oxidation disorders.

Conclusions:

  • Early identification of neonatal metabolic myopathies is vital.
  • Understanding these genetic defects aids in timely diagnosis and intervention.

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