[Imbalance of microelements and vitamins in adolescents with diffuse nontoxic goiter and biliary dyskinesia].

The purpose of the present work was to study the level of microelements and vitamins in adolescents with diffuse nontoxic goiter. It has been shown that comorbid biliary dyskinesia leads to significant dysregulation of vitamin and mineral metabolism: the level of essential elements was decreased and the level of toxic elements was increased. Comorbid biliary dyskinesia in adolescents with diffuse nontoxic goiter was accompanied by a disbalance of vitamins.

[Immunogenetic characteristics of nuclear families of adolescents with delayed sexual development].

The paper submits data on the antigenic composition of HLA system in members of nuclear families of adolescent boys presenting with the delay in sexual maturation. Positive and negative associations of particular antigens with sexual underdevelopment are stated. Estimated in the families was the highest incidence rate of gaplotypes A 28-B 40, A 28-B 8, A 1-B 40, and A 3-B 40.

[Gonadotropic function of the hypophysis in girls with delayed puberty].

Radioimmune assay of serum levels of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) in 216 girls aged 13-18 years with pubertal delay (PD) unrelated to gonadal dysgenesis have shown that LH and FSH levels were normal in 48.1%; one or both gonadotropins were decreased in 17.1%, only LH level was increased in 13.

[Features of indoleamine metabolism in adolescent girls with delayed sexual development].

Indolamine metabolism was studied in 203 patients with retarded sexual development of different genesis and in 116 girls of the same age. Considerable disorders in the level of serotonin and the products of its metabolism: 5-oxy-indoleacetic acid and melatonin, a hormone synthesized by the pineal gland--were found in abnormal sexual maturation. The nature of revealed changes depended, to a large extent, on genesis of disease which could be used for differential diagnosis of different forms of retarded sexual development.