Abstract
The results of mass screening for gastric cancer in the employee using endoscopy from 1993 to 2003 fiscal year were examined. The endoscopic examinations were performed in 50, 276 cases. On these occasions, 77 gastric cancer cases were detected. By means of the accurate follow-up study, it became clear that the false negative rate of gastric cancer within three years after the initial examinations from 1993 to 2000 fiscal year amounted to 38.1%. The false negative cases are not always caused by the overlooks, but also by the inevitable reasons. But it is necessary that endoscopists do their best in order to reduce the false negative rate. In conclusion, though the endoscopic examinations were regarded as “gold standard” in mass screening for gastric cancer, endoscopists should always mind that the false negative cases can occur and should therefore examine endosopy as careful and exact as possible.
