15% of lung cancers in the US are of this type.<unk>  cell lung cancer occurs almost exclusively in smokers – most commonly in heavy smokers and rarely in non-smokers.
Small-cell carcinoma
Adenomatoid tumor
Mucinous carcinoma
Sarcomatoid carcinoma
Spindle cell carcinoma
Signet ring cell carcinoma
Adenosarcoma
Adenocarcinoma