The present invention relates to a method of predicting the risk of lung cancer diagnostic kit using the same, and Korean, specifically DNA- methyl transferase -3B (DNA-methyltransferase-3B, DNMT3B) gene -283T C and -579G T method to investigate polymorphism (polymorphism) of predicting the risk of lung cancer, and by using this relates to a diagnostic kit for testing a genetic risk factor for lung cancer. Using the same method and diagnostic kit for predicting the risk of lung cancer according to the present invention in Korean lung cancer, especially adenocarcinoma and identified as a factor in determining the genetic susceptibility to small cell carcinoma of the gene DNMT3B -283T C and -579G T polymorphism predict the risk of lung cancer by examining the incidence egeseodo not know that smokers exposed to smoke a long time smoker or non-smoker, as well as easy ways to be useful in preventing them.
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