Why Do Some Lifelong Nonsmokers Get Lung Cancer?

ScienceDaily (Sep. 10, 2008) — A new American Cancer Society study sheds light on the ten to fifteen percent of lung cancers that are caused by factors other than tobacco smoking.

"...if lung cancers not caused by smoking were considered a separate category, it would rank among the seven to nine most common fatal cancers in the U.S. The researchers say as the number of never-smokers in the U.S. and other developed countries is increasing, this is a subject of particular interest and importance."