APOBEC3B and neoplasm: For DFS, serous histological subtype (serous vs. non-serous: HR 2.29, 95% CI 1.18–4.43, p = 0.014), higher FIGO stage (III/IV vs. I/II: HR 9.40, 95% CI 4.23–20.86, p < 0.0001), intravascular tumor thrombus (Yes vs. No: HR = 2.00, 95% CI 1.07–3.75, p = 0.030), elevated serum CA125 (≥ 35 U/mL vs. < 35 U/mL: HR 5.90, 95% CI 1.43–24.32, p= 0.014) and over-expression of APOBEC3B (+++/++ vs. ± : HR 5.18, 95% CI 2.48–10.80, p< 0.0001) were significantly associated with worse DFS in the univariate analyses (Table 3).