Lung Cancer Lung cancer takes years to develop. It results from the uncontrolled growth of abnormal cells in one or both lungs. These cancer cells form lumps and disrupt the lungs, the breathing tubes (bronchi) or both, at times interfering with their normal function. Unfortunately, lung cancer is often not discovered until it has spread (metastasized) throughout the body. Sometimes, however, lung cancer is detected earlier through a chest X-ray or other exam that has been conducted for an unrelated…
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