[Effect of an additional whole-body irradiation on the induction of rat liver neoplasms by x-rays].

In direct single exposure of the rat liver to x-rays in the dosage to 4600 r cholangiocellular tumors were induced in 44.4% of animals. An additional total x-ray irradiation in rats in doses of 200 and 400 r increases the incidence of hepatic tumors up to 76.1 and 82.9% accordingly, shortens the latent period and contributes to the appearance of hepatic tumors of various genesis, including hepatocellular ones.