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Growth curves for Laron syndrome
1Institute of Pediatric and Adolescent Endocrinology Children's Medical Center, Beilinson Campus, Sackler Faculty of Medicine, Petah Tikva, Israel.
Archives of Disease in Childhood
|June 1, 1993
Summary
Growth curves for children with Laron syndrome reveal significant growth retardation from birth, with no clear pubertal spurt. Final heights were notably shorter than average, establishing a model for insulin-like growth factor-I deficiency.
Area of Science:
- Pediatrics
- Endocrinology
- Genetics
Background:
- Laron syndrome is a rare genetic disorder characterized by primary insulin-like growth factor-I (IGF-I) deficiency.
- Growth retardation is a hallmark feature, evident from birth and persisting throughout childhood and adolescence.
Purpose of the Study:
- To construct detailed growth curves for children with Laron syndrome.
- To establish a reference model for growth patterns in primary and secondary IGF-I deficiencies.
- To provide a basis for monitoring treatment outcomes in Laron syndrome.
Main Methods:
- Longitudinal growth measurements (height) were collected from 24 patients (10 boys, 14 girls) with Laron syndrome.
- Growth data were analyzed across infancy, childhood, and puberty.
- Upper to lower body segment ratios were assessed.
Main Results:
- Growth retardation was observed from birth (42-46 cm).
- Postnatal growth curves deviated significantly from normal trajectories.
- No distinct pubertal growth spurt was identified in either sex.
- Final mean height for girls was 119 cm (16-19 years), and for boys was 124 cm (beyond 20 years).
- Upper to lower body segment ratio exceeded 2 SD above the normal mean.
Conclusions:
- The constructed growth curves serve as a valuable model for Laron syndrome and other IGF-I deficiencies.
- These curves are essential for tracking growth in untreated patients and evaluating the efficacy of recombinant IGF-I therapy.