What are the chances of getting lung cancer after 30 years of being smoke free?

Question by Made_in_America: What are the chances of getting lung cancer after 30 years of being smoke free?
My father is 80 and has not smoked for 30 years. He was just diagnosed with Small Cell lung cancer and will be undergoing an aggressive chemo/radiation therapy. Can an individual get lung cancer after not smoking for 30 years or do you think there is another variable causing the cancer?

Best answer:

Answer by vampire_kitti
of course they can, but after 30 year the risk is almost the same as that of a non-smoker so his cancer is likely to be from second hand smoke of someone else or from other causes.
good luck to your father.

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