[Obesity in childhood].

In this article presented modern data on the definition of obesity in childhood and its prevalence. Were reflected the basic diagnostic criteria for obesity and metabolic syndrome. Were analyzed genetic changes, hormonal factors, influence lifestyle of modern man as the reasons of the obesity. Are also was considered data on the relation of obesity and its complications such as cardiovascular, metabolic syndromes, nonalcoholic fatty liver disease. Was reflected the views of various specialists (cardiologists, endocrinologists, gastroenterologists, pediatricians) to the problem of overweight and obesity in children and adolescents. Were presented modern data on the approaches to the treatment of obesity in children.