
Description
Lung cancer, like all cancers, is the result of an abnormal cell, the most basic unit of life. Normally, the body maintain a system of checks and balances on cell growth, so that cells divide to produce new cells are needed. Disruption of the balance system of uncontrolled cell growth and eventually form a mass called a tumor.
Tumors can be benign or malignant, and malignant tumor is called cancer. Benign tumors can usually be removed and not spread to other body parts. Malignant tumors, on the other hand, grow aggressively and attacking other body tissues, so that the tumor cells into the bloodstream or lymphatic system and then...