Smoking Can Cause Lung Cancer

90% of lung cancers are caused by cigarette smoking, making it the number one risk factor for lung cancer. Cigarette smoking causes cancers of the lung, mouth, nose, throat, voicebox (larynx), esophagus, liver, bladder, kidney, pancreas, colon, rectum, cervix, stomach, blood, and bone marrow (acute myeloid leukemia).

A Secondhand Smoke can also cause lung cancer. It is a smoke from other people's cigarettes, pipes, or cigars. If you breathe in secondhand smoke, it is like he or she is smoking.

Types of lung cancer

Small cell lung cancer - occurs in heavy smokers.
Non-small cell lung cancer - include squamous cell carcinoma, adenocarcinoma and large cell carcinoma.