Malakoff

The organization of bronchopulmonary cancer screening in the Ile de France region, within the Mutualists and its affiliated health centers, is based on a clear, simple and functional process: * Definition of eligibility criteria for screening, based on those of the NELSON study, * Referral and consultation by a health center physician trained in these criteria, * Referral and performance of a chest Computer Tomography Scanner (CTscan) according to the same recommendations, * Structured centralized reading and interpretation of CTscan images, * Referral to a multidisciplinary team (CITT), if bronchopulmonary cancer is suspected, * Referral to a tobacco unit in a health center for smokers who have not stopped smoking, * Organization of follow-up and continuation of the screening program.