Lung cancer has overtaken breast cancer as the leading cancer killer of women in developed countries, reflecting changing smoking patterns among females worldwide, a new report shows. Legions of women began smoking four decades ago, and the dire consequences are just being seen now in wealthy countries, the researchers explained. Lung cancer has been the leading cause of cancer deaths among men in developed countries for decades, and the leading cause of cancer death for U.S. women for some years. The disease is almost always caused by smoking, said lead researcher Lindsey Torre, an epidemiologist at the American Cancer Society/U.S. News & World Report. More here.