Risk factors<unk>  is closely correlated with a history of tobacco smoking, more so than most other types of lung cancer. According to the Nurses' Health Study, the relative risk of SCC is approximately 5.5, both among those with a previous duration of smoking of 1 to 20 years, and those with 20 to 30 years, compared to never-smokers. The relative risk increases to approximately 16 with a previous smoking duration of 30 to 40 years, and approximately 22 with more than 40 years.
Squamous-cell carcinoma of the lung
Sarcomatoid carcinoma of the lung
Adenocarcinoma of the lung
Giant-cell carcinoma of the lung
Pulmonary sclerosing pneumocytoma
Acinic cell carcinoma of the lung
Non-small-cell lung carcinoma
Large-cell lung carcinoma