Just in the US lung cancer is responsible for about 160,000 deaths every year & approx. 225,000 new cases are diagnosed every year. The uncontrolled growth of cells in the lungs spreads rapidly & has easy access to other major organs. The #1 cause of lung cancer is smoking, big surprise there, second hand smoke plays a role as does heredity, you may never smoke & still die from it. My aunt died from lung cancer, she never smoked a day in her life, but the time she was really ill it was to late, her lungs were black.
Lung cancer is the most commonly diagnosed cancer in the world. In the UK, it is the second most-frequently occurring cancer, accounting for one in seven new cases. Nine in ten of these can be squarely blamed on the pernicious effects of tobacco smoking - and unfortunately the majority of cases cannot be cured. shortness of breath *drop in ability to exercise * persistent chest pain * persistent cough or coughing up blood * loss of appetite, weight loss and general fatigue