Lung Cancer

Anyway you cut it the prognosis is dismal.

While lung cancer is mostly preventable through avoidance of tobacco products, smokers, health care providers, and scientists have unsuccessfully tried other preventive approaches, such as screening for early disease with chest radiographs and sputum cytology (secondary prevention).

National Academies

Small-cell: "Smoking is by far the leading risk factor for lung cancer. Tobacco smoke causes more than 8 out of 10 cases of lung cancer. The longer a person has been smoking and the more packs per day smoked, the greater the risk. If a person stops smoking before lung cancer develops, the lung tissue slowly returns to normal. Stopping smoking at any age lowers the risk of lung cancer." Source American Cancer Society.

And again for non-small cell lung cancer: Non-small cell

It looks like a case of bad winger statistics meant to remove cancer from personal behavior. "Lung cancers-ONLY 20% are caused by smoking. That is a fact well known in the medical community. It isn't talked about alot [sic] because doctors don't want more people to think it's OK to smoke." Raven in New Hampshire. Jesus H. Christ on a shingle. Shhh. It's a secret!

Despicable wingnuttery. Nutballs! Nutballs I tell you.