What are sx of lung cancer? Casue? Prevention?

Most are asx 10% sx (cough, hemoptysis, SoB, weight loss, clubbing) Major cause: smoking, others (radiation, pollution, asbestos) Best prevention stop smoking, second best screening by low dose CT Imaging enables visualisation of the size and location of tumours, and potential nodal involvement Chest X-ray is often used first due to its widespread availability More detailed imaging of lymph nodes, soft tissues and tumours is performed through MRI and/or PET/CT scans due to their increased sensitivity Low dose radiation CT scanners induce 20% reduction in lung cancer mortality