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For stage II patients, there were 48 cases with lymph node metastases. Of these, 11 patients were detected with No. 7 lymph node metastasis, while the other 37 patients had no involvement of No. 7 lymph nodes. The calculated 5-year overall survival rate of stage II patients with lymph node involvement was 68%, with No. 7 lymph node metastasis was 59%, and without No. 7 lymph node metastasis was 70%, which were not statistically significant (P=0.666).
