The actor John Wayne smoked 5 packs of camel cigarettes a day for 40 years before he was diagnosed with LC in 1963.
John Wayne had LC back before there was comprehensive chemo just radiation available.
As such, John Wayne had a pneumonectomy (Left Lung), a few months of follow up radiation and then no reocurrence for 16 years until he developed stomach cancer and died shortly thereafter.
John Wayne is just one of a long list of people who survived 15 or more years after being diagnosed with LC, but most of these survivors have one thing in common and that is, they all had limited LC confined to one lung at the time of diagnosis, and they all were able to have it surgically remove as a first option.
I have one patient at a nursing home I oversee and she had a left lung pneumonectomy in 1978 because of multiple masses in both lobes with minimal lymph node involvement. She is still alive and has had no reoccurence to date!
Keep the faith people.