Two Main Types of lung cancer: Small-cell lung cancer is more aggressive, meaning it can spread quickly to other parts of the body early in the disease. It is strongly tied to cigarette use and is rare in nonsmokers. Non-small-cell lung cancer grows more slowly and is more common. It's responsible for almost 85% of all lung cancers. Accurate? So is this saying that 85% of lung cancers are not smoking related? ...................... (I just had a friend die of cancer----------from prostate to lymph nodes to lungs to death.) One helluva bad year for him.