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Lung cancer is a serious and potentially life-threatening condition characterized by the uncontrolled growth of abnormal cells in the lungs. It is one of the most common cancers globally and is often caused by smoking, though non-smokers can also develop the disease. Early detection through imaging such as chest CT scans can significantly improve treatment outcomes. Symptoms may include persistent coughing, chest pain, shortness of breath, or unexplained weight loss. Advances in lung cancer screening and treatments such as surgery, chemotherapy, immunotherapy, and radiation have improved survival rates, especially when the cancer is caught in its early stages.