[Monitoring of congenital malformations in children in the Kursk region].

The research established the frequency, spectrum and the prevalence of congenital malformations (CM) in the Kursk region, the analysis of the results of monitoring the CM for the period from 2005 to 2009 has been performed. The evaluation of influence of the major pollutants of air and soil on the possibility of CM arising in children in the Kursk region has been presented.

[State of the renin-angiotensin system in children with different clinical variants of congenital adrenal cortex hyperplasia caused by 21-hydroxylase deficiency].

A study was made of plasma renin activity (PRA) and serum aldosterone (A) in 52 children with congenital hyperplasia of the adrenal cortex due to 21-hydroxylase deficiency. There were 40 girls and 12 boys aged 1.5 months to 14 years.

[The concentration of carcinoembryonic antigen and carbohydrate antigen Ca-19-9 in the blood serum in cancerous diseases of the gastrointestinal tract].

The results of comparative investigation of 266 cancer patients, 44 patients with benign G. I. tract diseases and 66 healthy subjects using 2 tumor markers (CEA and Ca-19-9) showed the diagnostic value of both methods, not exceeding 38-42%.