There is one indisputable fact about lung cancer -- the earlier the disease is detected, the better the chances of curing it. This is why lung cancer screening is of prime importance. Doctors point out that although the overall survival rate for lung cancer at the five-year mark is only 15%, the survival rate for those whose cancer was detected early and could be surgically treated is as high as 80%. For this reason, some doctors recommend periodic lung cancer screening with chest x-rays. Once this disease has progressed somewhat, it will spread rapidly to other areas of the lung and to critical organs all over the body. At that stage, surgery is no longer a viable treatment method. Unfortunately, the early stages of lung cancer do not give rise to any alarming symptoms. Common symptoms include a persistent cough, a tendency to get respiratory illnesses, etc. These symptoms are not linked to lung cancer alone. This is why lung cancer is rarely diagnosed till it is too late. In this con...