Never smoked? You could still be at risk of developing lung cancer, doctors warn

Never smoked? You could still be at risk of developing lung cancer, doctors warn

Medical experts note concerning trend in patients without traditional smoking history

Up to 20% of lung cancers affect people who have never smoked or have smoked fewer than 100 cigarettes in their lifetime. (iStock)

Most lung cancers fall into two groups: non-small cell lung cancer (NSCLC) and small cell lung cancer (SCLC), according to the American Cancer Society. (iStock)

The main factor driving up the share of non-smokers among lung cancer patients is the successful drive to reduce tobacco consumption in the U.S., experts say. (iStock)

Exposure to occupational hazards like radon, asbestos and diesel exhaust can increase lung cancer risk. (Photo by Gado/Getty Images)