Screening for thyroid cancer among children and adolescents of Bryansk oblast and Fukushima prefecture as a factor increasing the disease incidence rate

The article continues research on radiation risks and screening effect in childhood thyroid cancer in the Bryansk oblast in Russia and Fukushima Prefecture in Japan. The subjects of the study are people exposed to radiation at the age under 18 years old. The Bryansk cohort under study included about 78729 children and adolescents (at time of exposure), resided in the mostly contaminated with radionuclides areas. Average radiation dose to the thyroid was 218 mGy, maximum dose was 4.48 Gy. For the follow-up period lasted from 1.01.1991 to 31.12.2013 300 thyroid cancer cases were detected. According to demographic information, from 78729 children and adolescents exposed to radiation 20577 people lived in the areas of iodine deficiency, among them 121 thyroid cancer cases were detected. For more than 25 years after the Chernobyl accident radiation risk of thyroid cancer has remained significant, it depends on the age at exposure and attained age (ERR/Gy=4.28; 95% CI: 2.24; 7.19; p function show_eabstract() { $('#eabstract1').hide(); $('#eabstract2').show(); $('#eabstract_expand').hide(); }