[The immunological aspects of a hip joint lesion in childhood].

The paper presents an in-depth analysis of immunological mechanisms of the hip joint synovitis development in children. Studied in the pediatric patients with transient coxitis, Perthes disease, and tuberculous coxitis (n = 54, 15, and 15 respectively) with the aid of flow cytofluorometer FACStar PLUS was the subpopulation of immunocompetent cells with a wide spectrum of MCAB. Controls (n = 35) were sex and age-matched. Comparative analysis of immunological parameters in the above children disclosed a toxic-and-allergic origination of transient synovitis with predominant affection of the T-cell link of immunity (T-helpers failure and activation of T-suppressors). Joint mucose injury was noted to be developing against the background of reduction of serum IgA. Activation of non-specific mechanisms (natural killers, increase in SDH activity) is of compensatory character. Mechanisms of activation of cell processes (expression of panmitogenic receptor CD4+ antigen) in Perthes disease warrant further studies. In patients with tuberculous coxitis, immunological incompetence develops in the presence of cytotoxic reactions and activation of the B-link, with the production of IgM being on the increase but with no essential changes in the IgG fraction. It is necessary that selective stimulators of T-helpers be included into the treatment scheme together with drugs capable of exerting a selective effect on the T-link of immunity.