[Interactions of radiation factors and smoking in the etiology of lung cancer in workers of atomic enterprises].

It was shown on the basis of retrospective investigation of 500 workers at a nuclear enterprise (162 cases of lung cancer, 338 persons as matching control) that the interaction of external gamma-irradiation (> 2.0 Gy) and the body-burden of 239Pu (> 9.3 kBq) at lung cancer incidence in multiplicative.