Early detection of cancer when the cells may be premalignant and potentially curable would be most beneficial. However, a tumor must be 1 cm in diameter before it’s detectable on a chest x-ray, so this is difficult. A bronchoscopy may help identify cell type but may not increase survival rate. High-dose chemotherapy has minimal effect on long-term survival. Smoking cessation won’t reverse the process but may help prevent further decompensation.