Abstract
It had been pointed out that the criteria for interpreting chest X-ray findings in lung cancer screening had some problems. The most important problem was that Categories D and E were used in different concepts according to region. In some areas, Category E was selected when the chest X-ray findings were suspicious for lung cancer, even slightly. However, in other areas, Category E was selected only when the chest X-ray findings were strongly suspicious for lung cancer, while Category D was selected when there was some doubt. This discrepancy was not appropriate, and the concepts should be unified. Recently, a revised version of the criteria was published on the website of The Japan Lung Cancer Society. In this article, we describe the background and aim of the revised criteria, particularly Categories D and E. In addition, we emphasize that only Category E should be selected when the chest X-ray findings are suspicious for lung cancer, even slightly.
