The study of disorders of systemic immunity and immune regulation in idiopathic transient synovitis of the hip joint (ITSHJ) and disease Legg-Calve-Perthes (DP) in children of early and school age. Studied 37 children with ITSHJ and 11 children with DP in the age interval of 3-12 years. The control group consisted of 29 healthy children. https://allfixelectricales.shop/product-category/ignition-module/