As for other lung cancer subtypes, lung<unk>  incidence is strongly associated with smoking. Incidence of pulmonary<unk>  has been increasing in many developed Western nations in the past few decades, with a share reaching 43.3% of all lung cancers in the US as of 2012, thus replacing squamous cell lung carcinoma as the most common type of lung cancer. This can be largely attributed to the decreasing smoking rates, which favors the<unk>  histology. Indeed, although smoking is still its strongest risk factor, lung<unk>  is by far the most common among lifelong non-smokers (
Adenocarcinoma of the lung
Giant-cell carcinoma of the lung
Sarcomatoid carcinoma of the lung
Acinic cell carcinoma of the lung
Squamous-cell carcinoma of the lung
Non-small-cell lung carcinoma
Pulmonary sclerosing pneumocytoma
Epithelial-myoepithelial carcinoma of the lung