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Growth and developmental patterns in Prader-Willi syndrome

H Ehara1, K Ohno, K Takeshita

  • 1Division of Child Neurology, Tottori University School of Medicine, Yonago, Japan.

Journal of Intellectual Disability Research : JIDR
|October 1, 1993
PubMed
Summary

This study on Prader-Willi syndrome in Japanese infants reveals initial growth retardation and developmental delays. However, hyperphagia later leads to significant weight gain, impacting overall development.

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Area of Science:

  • Pediatrics
  • Genetics
  • Developmental Biology

Background:

  • Prader-Willi syndrome (PWS) is a complex genetic disorder affecting growth and development.
  • Early identification and understanding of PWS manifestations are crucial for intervention.

Purpose of the Study:

  • To investigate the growth patterns and developmental milestones of Japanese patients with Prader-Willi syndrome from infancy.
  • To correlate chromosomal aberrations with clinical phenotypes in PWS patients.

Main Methods:

  • Longitudinal study of 11 Japanese infants diagnosed with Prader-Willi syndrome.
  • High-resolution chromosome banding technique to identify chromosomal aberrations.
  • Assessment of growth parameters (birth weight, weight gain, height increase) and developmental milestones (developmental quotient).

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Main Results:

  • 40% of patients exhibited chromosomal aberrations.
  • 10 out of 11 patients had below-average birth weight, with severe growth retardation by 6 months.
  • Transient height and weight retardation occurred between 10-18 months, followed by rapid weight gain due to hyperphagia.
  • Mean developmental quotient was 50, indicating significant developmental delays, irrespective of chromosomal aberration status.

Conclusions:

  • Prader-Willi syndrome presents with initial growth failure and developmental delays in infancy.
  • Hyperphagia is a key factor in later rapid weight gain.
  • Chromosomal aberrations did not significantly influence developmental milestones in this cohort.