検診発見による早期肺癌に関する研究
第2編 早期X線所見に関する検討
1994 年 106 巻 5-6 号 p. 631-639
詳細
1994 年 106 巻 5-6 号 p. 631-639
To clarify the radiographic features of early lung cancer, the author investigated annual chest radiographs of 234 patients with lung cancer detected by mass screening. Abnormality could be detected on the previous radiographs in 79% of the patients when reviewed retrospectively. The causes for failing to detect the tumor on the previous examination were as follows: 1) It was too small or too faint to detect. 2) It overlapped with other organs such as vessels or ribs or coexisted with the preceding pulmonary lesions. 3) In some instances, only a linear (non-tumorous) shadow was initially present on chest radiograph.
These results indicate that systematic and careful reading of chest radiograph and comparative reading with the previous films are necessary, and that it is important to learn the causes for failing to detect the tumor shadow.
