Yes...small cell lung cancer. It is the worst and spreads very fast. If diagnosed in Stage Four, the patient has only 3-6 months left.
I know because my sister had this and died less than 2 months after diagnosis.
It's been 4 months since he was diagnosed.
My brother-in-law who never smoked was diagnosed of lung cancer and succumbed withing 4 or 5 months. He was hardly ever sick before that. We believe the second hand smoke in his office was responsible.
I remember reading a stat that only 1 in 5 smokers get lung cancer, for non-smokers it is something like 1 in 25.