[Problems and future directions for early detection of lung cancer]

Mass screening methods for lung cancer consist of X-ray examination in men and women over 40 years of age and X-ray examination plus sputum cytology test confined to high risk groups. Examination methods which seem to be most effective for early detection at present are introduced based on the results of the examinations and treatment provided. If we are to conduct this method extensively in the future there remain many problems unsolved yet: how to systematize the execution, to contact with more examinees, to increase examination capability and effectiveness etc. Our recent directions for the nation-wide mass screening of lung cancer consist of four methods: 1. Utilization of local self-governmental mass screening. 2. Mass screening conducted by general practitioners at local clinics. 3. Active cooperation of general practitioners with local self-government. 4. Public participation in the lung project. We should continue our efforts to solve these problems.