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After Chernobyl.

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Air Pollutants↗

Acute leukemias in children from the city of Kiev and Kiev region after the Chernobyl NPP catastrophe.

During 1993-1997, 247 cases of childhood acute leukemia (AL) were analyzed among inhabitants of the city of Kiev and Kiev region, excluding the most contaminated areas belonging to the strict control zone. The criteria of an FAB classification supplemented by immunophenotyping data were applied. The AL pattern was shown to be quite typical except for several peculiar features characteristic of this regional group of patients, especially the absence of age peaks in children with acute myelogenous leukemias (AML), increased frequency of the T1 variant in T-cell acute lymphoblastic leukemia (ALL), and higher levels of M4 and M5 variants in AML. A typical variant of M5a-AML with minimal signs of differentiation was found.

Child↗

Time trends of thyroid cancer incidence in Ukraine after the Chernobyl accident.

The rate of childhood thyroid cancer incidence observed in northern Ukraine during the period 1986-1998 is described as a function of time-since-exposure, age-at-exposure, and sex. Conclusions are drawn for the excess absolute risk per dose: after a minimal latency period of about three years it shows a linear increase with time-since-exposure for at least nine years. It is roughly constant in age-at-exposure, up to 15 years. For girls exposed very young it is about a factor 2 larger than for boys. For children exposed at age 16-18 this ratio increases to about 5. The thyroids of young children are not more sensitive to radiation dose than those of older ones in absolute risk in northern Ukraine in the currently used data set. As the background is increasing with age, a constant absolute risk gives a decreasing relative risk.

Adolescent↗