Abstract
Forty one cases with lung cancer were found among the 97, 980 candidates for the various health screening organisations by our new system. This system consisted of two steps. At first, subjects at high risk of lung cancer were checkd up by symptoms and chest X-ray finding, and then sputum cytologic test were applied to this high risk group.
Among these cases with lung cancer, 9 (22%) were the early cancer, whose seven cases were diagnosed by the sputum cytologic test alone. Six in the nine were the “Chest X-ray negative” hilar early cancers.
The sputum cytology test needs minimum of 3 consecutive day specimens. Thus it was concluded that the means of our new system for lung cancer mass survey would be very effective, especially from the economical standpoint.
