The article presents the main characteristics of the Syndrome of undiff erentiated connective tissue dysplasia, refl ecting the essence of this problem in the system of public health, in particular children and adolescents. The mechanism of the formation of this condition and its clinical manifestations are consecrated.

Due to the spread of undiff erentiated forms of connective tissue dysplasia, it seems relevant to assess the impact of organogenesis disorders on the physical development of schoolchildren living in the northern region. What dictates the need to study the interrelationships and interdependencies of the components of physical development and somatometric indicators in children of the north with phenotypic markers of UCTD. The eff ect of posture disorders on the studied components of physical development is manifested by higher growth in children with a fl at and round-concave back, a decrease in the thickness of skin-fat folds and the size of the head with a round and round-concave back. Therefore, to analyze the intersex and age diff erences in physical development in children with NDT, it is necessary to take into account the dynamics of interdependent anthropometric indicators and indices, taking into account the types of posture disorders.