[Breast cancer in Chapayevsk].

Numerous epidemiological surveys show the ambiguity of evaluation of stable organic chlorine compounds as a risk factor for breast cancer (BC). This is likely to be, to a certain degree, associated with the specific features of performance of epidemiological surveys. The selection of cases of BC from different areas has provided groups with different levels of exposure that as judged from the content of the above substances in the biological environments.

Physical growth and sexual maturation of boys in Chapaevsk, Russia.

We characterized physical growth and sexual maturation in 2,579 boys, ages 10 through 16.99 years, residing in Chapaevsk, Russia in order to establish region-specific reference data. Age-specific norms were established for height, weight, and BMI, and compared to US reference data by z-score analysis, while mean heights and weights by age were compared to published national Russian data.

[Effects of dioxins in the development of malignant tumors and disorders of reproductive health of the population].

The mortality caused by malignant tumors in the town of Chapaevsk, characterized by increased level of dioxins in the environment, is statistically higher than the expected values. For men the relative risk of general morbidity is 1.9 and mortality, 1.

[Dioxins in the environment and in the blood and breast milk of residents of the town of Chapayevsk].

Chapayevsk has a 30-year history of producing organochlorines, leading to environmental dioxin pollution. As much as 3 kg of these substances are annually formed at the plant. The concentrations of dioxins in the ambient air were found to be 0.