Abstract
The effectiveness of mass survey was evaluated in 705 cases that were studied concerning the reason for detection in relation to cell type, the site of origin, the stage, the rate of operability, and any reasons for delay in diagnosis. The rate of cases detected by mass screening was 33.0% (233/705cases) . In the screening detection group, stage O and I cases accounted for 40.3% of all cases. The group detected as a result of symptoms accounted for 9.3%. Absolutely curative operations were performed in 46.8% of the screening detected group, and in 18.4% of the group detected as a result of symptoms. Mass survey was usefull for the detection of early lung cancer, but the screening detection group spent up to 37.9 weeks to begin therapy, and 52.9% of all patients were detected 39 weeks of diagnostic delay. Therefore improvement is still necessary.
