Aim: The purpose of the study was to evaluate whether preoperative cancer antigen 125 (CA-125) levels predict outcome of secondary cytoreductive surgery (SCS) in patients with serous recurrent ovarian cancer and whether this could be used as a prognostic factor for progression-free (PFS) and overall (OS) survival. Patients and Methods: A cohort of 111 patients with first recurrence of platinum-sensitive serous ovarian cancer, who had undergone SCS at the Department of Gynecology and Oncological Surgery, Charité, Campus Virchow Clinic was analyzed in correlation with the preoperative CA-125 value. Results: The median preoperative CA-125 level was 164 U/ml. Complete tumor resection was achieved in 58.6% of the patients. PFS and OS for patients with preoperative CA-125 of less than 164.5 U/ml was significantly better than those with preoperative CA-125 ≥164.5 U/ml (p=0.025 and p<0.001, respectively). Conclusion: Preoperative CA-125 is not a statistically significant predictive factor for complete tumor resection after SCS. Preoperative CA-125 <164.5 U/ml can predict significantly better PFS and OS for patients with first recurrence of platinum-sensitive ovarian cancer.
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