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X-linked myotubular myopathy in a female infant caused by a new MTM1 gene mutation

Ulrike Schara1, Wolfram Kress, Jens Tücke

  • 1Department of Pediatrics and Pediatric Neurology, Ruhr-University Bochum, Germany. Ulrike.Schara@t-online.de

Neurology
|April 23, 2003
PubMed

Insights

X-linked myotubular myopathy (XLMTM) typically impacts male infants severely. This report details a female infant with XLMTM presenting prenatally, challenging typical disease presentation.

Area of Science:

  • Genetics
  • Neuromuscular Disorders
  • Pediatric Medicine

Background:

  • X-linked myotubular myopathy (XLMTM) is a severe congenital neuromuscular disorder.
  • Typically, XLMTM presents in male infants with significant weakness and respiratory failure.
  • Female carriers usually exhibit milder, slowly progressive symptoms.

Observation:

  • This study focuses on a 5-year-old female diagnosed with XLMTM.
  • The patient exhibited prenatal and neonatal onset of symptoms.
  • A specific 605delT mutation in the myotubularin gene was identified as the cause.

Findings:

  • The case demonstrates that XLMTM can manifest severely in females, contrary to the typical carrier phenotype.
  • Prenatal/neonatal onset in a female suggests a broader spectrum of clinical presentation for this genetic condition.
  • The identified mutation in the myotubularin gene is directly linked to the observed severe phenotype.

Implications:

  • This case expands the understanding of XLMTM's clinical variability in females.
  • It highlights the importance of genetic testing for suspected neuromuscular disorders, regardless of sex.
  • Further research may be needed to explore the genetic and molecular factors influencing XLMTM severity in females.

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