Lung cancer was diagnosed in about 115,610 men and 105,590 women in the United States in 2015, and 86% of pts die within 5 years. Lung cancer, the leading cause of cancer death, accounts for 28% of all cancer deaths in men and 26% in women. Peak incidence occurs between ages 55 and 65 years. Incidence is decreasing in men and increasing in women.