Besides, among the survivors of Chernobyl and Hiroshima–Nagasaki atomic bombings, a significant increase in thyroid cancer incidence in adulthood was found after exposure to low doses of IR during adolescence and over 70% of thyroid cancers were accompanied by a distinctive feature: RET/PTC1 rearrangements.6, 7, 8. The gene discussed is RET; the disease is thyroid gland carcinoma.