Craniofacial morphology in obese adolescents

Area of Science:

• Pediatric Endocrinology
• Craniofacial Biology
• Obesity Research

Background:

• Overweight and obesity are significant global health concerns, affecting approximately 30% of the Swedish adolescent and adult population.
• Obesity in children often presents with normal to accelerated growth rates, paradoxically accompanied by low growth hormone (GH) levels.
• The interplay between obesity, hormonal factors, and physical development, particularly craniofacial morphology, requires further investigation.

Purpose of the Study:

• To investigate potential differences in craniofacial morphology between obese adolescents and normal-weight adolescents.
• To explore the relationship between obesity, growth hormone (GH), and insulin-like growth factor 1 (IGF-1) in adolescent craniofacial development.

Main Methods:

• Lateral cephalograms were analyzed from 39 obese adolescents (aged 14-16 years).
• Data were compared with an equal number of sex- and age-matched normal-weight controls.
• Cephalometric analysis focused on craniofacial dimensions, including mandibular length, jaw prognathism, and anterior face height.

Main Results:

• Obese adolescents demonstrated significantly increased mandibular length compared to controls.
• Prognathic jaw relationships and reduced upper anterior face height were observed in the obese group.
• Despite low GH levels, obese adolescents maintained normal insulin-like growth factor 1 (IGF-1) serum levels.

Conclusions:

• Obese adolescents exhibit altered craniofacial morphology, characterized by enhanced mandibular growth and prognathism.
• The findings suggest that craniofacial growth in obese adolescents with low GH and high IGF-1 may be more influenced by circulating IGF-1 than locally produced GH.
• This highlights a potential dissociation between systemic hormonal profiles and craniofacial development in pediatric obesity.