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Epidemiology and Natural History of NAFLD
Claudia Della Corte1, Federica Ferrari2, Alberto Villani3
1Hepato-Metabolic Department, »Bambino Gesù« Children's Hospital, Rome, Italy.
Insights
Nonalcoholic fatty liver disease (NAFLD) is increasingly common in children, often linked to metabolic syndrome. Further research is needed to understand its progression and develop better diagnostic tools for pediatric NAFLD.
Area of Science:
- Hepatology
- Pediatric Gastroenterology
- Metabolic Disorders
Background:
- Nonalcoholic fatty liver disease (NAFLD) is a growing concern in pediatric populations, paralleling rising obesity rates.
- Pediatric NAFLD is frequently primary, strongly associated with metabolic syndrome features.
- Risk is influenced by age, gender, and ethnicity, with hormonal and metabolic factors playing a role in pathogenesis.
Purpose of the Study:
- To address the unknown prevalence of pediatric NAFLD due to diagnostic heterogeneity.
- To clarify the pathophysiology and natural history of pediatric NAFLD.
- To advocate for the development of noninvasive methods for pediatric NAFLD assessment.
Main Methods:
- Review of existing studies on pediatric NAFLD prevalence and characteristics.
- Analysis of factors influencing pediatric NAFLD risk and pathogenesis.
- Identification of knowledge gaps in pediatric NAFLD natural history and diagnostic approaches.
Main Results:
- Prevalence of pediatric NAFLD is uncertain due to varied diagnostic criteria and population characteristics.
- Pediatric NAFLD pathogenesis involves complex interactions between genetic and environmental factors, including liver crosstalk with gut and adipose tissue.
- Key determinants of risk include age, gender, ethnicity, sex hormones, insulin sensitivity, and adipocytokines.
Conclusions:
- Understanding the complex pathophysiology and natural history of pediatric NAFLD is crucial for effective management.
- There is a need for standardized, noninvasive methods for screening, diagnosis, and monitoring of NAFLD in children.
- Further prospective studies are required to elucidate the progression and long-term outcomes of pediatric NAFLD.
Abstract:
Paralleling the growing prevalence of obesity and metabolic syndrome, nonalcoholic fatty liver disease (NAFLD) is emerging as the most frequent hepatopathy in adults and children. The true prevalence of pediatric NAFLD is still unknown, because of the heterogeneity of diagnostic methods used for diagnosis in the available studies and the different characteristics of the populations evaluated. Pediatric NAFLD is typically of primary origin and it is strongly associated with several features of the metabolic syndrome. Age, gender and race/ethnicity are significant determinants of risk, and sex hormones, insulin sensitivity and adipocytokines are implicated in the pathogenesis of pediatric NAFLD. The natural history of NAFLD in children is still poorly understood, because of its complex nature and the scarcity of prospective studies, especially in pediatric populations. Both genetic and environmental factors seem to be implicated in the development and progression of the disease via multiple mechanisms that involve liver crosstalk with other organs and tissues, especially gut and adipose tissue. To evaluate and effectively treat pediatric NAFLD, the pathophysiology and natural history of the disease should be clarified and noninvasive methods for screening, diagnosis, and longitudinal assessment developed.