Sleep-related breathing disorders in children are usually caused by adenotonsillar hypertrophy and associated with many related disorders: pulmonary hypertension, developmental delay, sleepwalking, attention deficit hyperactivity disorder, obstructive sleep apnea, and enuresis. Numerous studies indicate the correlation of the above syndromes. Surgical removal of airway obstruction (adenotonsil lectomy) in most cases leads to complete resolution or significant improvement of comorbid disorders. A comprehensive interdisciplinary approach to the examination of this category of patients and their treatment with the participation of pediatricians, psycho-neurologists, and ENT specialists is required.