The role of heredity of lung cancer does enhance the threat to a certain extent, however, lung cancer is more possible to be associated with a genetic predisposition in women, in young adults, and in lung cancer in non-smokers.
Smokers who are prone to lung cancer are less likely to exhibit a family history in comparison to the non-smoker who form lung cancer. However, in case, if anyone is exhibiting a genetic predisposition to lung cancer, then smoking seems to exaggerate that threat.