 Total 1012 patients will be enrolled to this study. Among 506 high risk stage 1B adenocarcinoma patients, patients will be allocated to the treatment and the observation groups, 253 patients each. Also 506 low risk stage 1B adenocarcinoma patients will be enrolled as the observation group. Because, among stage 1B patients, it was revealed that the high risk patients whose nomogram point exceeds 104 occupied about 50 in analysis. 