Lung Cancer in Women on the Rise

http://online.wsj.com/article/SB10001424052748704764404575287081156194368.html#dummy

"The hormone estrogen is a possible culprit. Certain forms of estrogen are known to help create genetic mutations in cells and contribute to tumor formation in the breast. Recently, researchers found out that lung cells in both women and men also make estrogen, raising the possibility that the hormone contributes to lung-cancer development."