Non-Small Cell Lung Cancer (NSCLC) is the most common type of lung cancer, accounting for about 85% of all cases. It develops in the lungs and can spread to other parts of the body. NSCLC is often linked to smoking, but non-smokers can also be affected. Symptoms may include a persistent cough, chest pain, and difficulty breathing. There are three main subtypes of NSCLC: adenocarcinoma, squamous cell carcinoma, and large cell carcinoma. Treatment options vary based on the stage of the cancer and may include surgery, chemotherapy, and targeted therapies. Early detection is crucial for improving outcomes.