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Univiarate analysis for the patients who have received chemotherapy before surgery. The survival curve showed that chemotherapy have no correlation with (A) OS (P = 0.676) and (B) PFS (P = 0.922). In addition, we also performed the relationship between Ki-67 index and OS and PFS in the 9 patients treated with chemotherapy. A higher Ki-67 index had a trend with (C) better OS (P = 0.149) and correlated with (D) improved PFS (P = 0.024).
