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Congenital fiber type disproportion: severe form with marked improvement
M Tsuji1, Y Higuchi, K Shiraishi
1Department of Pediatrics, Kyoto University School of Medicine, Japan.
Pediatric Neurology
|October 8, 1999
Summary
This study details a rare case of severe congenital fiber type disproportion presenting neonatally with significant recovery of muscle strength and respiratory function. It highlights the potential for unexpected improvement in this condition.
Area of Science:
- Neurology
- Pediatrics
- Muscle Diseases
Background:
- Congenital fiber type disproportion (CFTD) is a rare neuromuscular disorder.
- Typically presents with severe hypotonia and weakness at birth, often requiring respiratory support.
Observation:
- A 30-month-old male presented with severe neonatal hypotonia and respiratory distress requiring mechanical ventilation.
- Demonstrated remarkable improvement in muscle power, achieving independent ambulation by 24 months.
- Histopathology confirmed CFTD at 11 months of age.
Findings:
- This case represents a severe neonatal form of CFTD with an unprecedented degree of functional recovery.
- The patient achieved motor milestones including sitting independently and walking unaided.
Implications:
- Physicians should consider CFTD in neonates with severe hypotonia and respiratory issues.
- The potential for significant improvement warrants awareness for families and clinical management.
- This case expands the known clinical spectrum of congenital fiber type disproportion.