Lung cancer is the leading cause of cancer deaths worldwide. This is partly due to the fact that it is very difficult to diagnose lung cancer in its earliest stage. By the time actual symptoms appear, the cancer has advanced and has usually spread beyond the lungs.
So finding a method of early detection is critical to improving survival rates. Professor Rudolf M. Huber from the University of Munich in Germany says, "The prognosis of lung cancer patients is very dependent on how advanced their disease...