Abstract 4401: The precision chemotherapy to improve the epithelial ovarian cancer prognosis

Abstract

Abstract Purpose: Recurrence is common in ovarian cancer patients, even in those patients who show complete response after first-line chemotherapy, 80% of the patients experience a recurrence. So gynecologic oncologists often have to consider several factors when choosing next chemotherapy regimen. Therefore, this study aimed to find serial chemotherapy regimen choice to anticipate patients’ better prognosis. Materials and Methods: We reviewed 656 patients diagnosed ovary cancer in one tertiary institutional hospital between 2006 and 2020. Patents’ clinic-pathologic characteristics, primary treatment, chemotherapy regimens, survival outcomes were collected. We divided patients into several groups according to their chemotherapy regimen by mechanism of action and compared them. 1st line chemotherapy(CTx) type 1: carboplatin-paclitaxel, carboplatin-docetaxol, cisplatin-paclitaxel, cisplatin-docetaxol2nd line CTx type 1: carboplatin-paclitaxel, carboplatin-docetaxol, cisplatin-paclitaxel, cisplatin-docetaxol2nd line CTx type 4: carboplatin-gemcitabine2nd maintenance CTx type 2: PARP inhibitor(PARPi)2nd line CTx Type 5: Platinum + topoisomerase inhibitor 2nd line CTx Type 6(cisplatin-vinorelbine)2nd line CTx Type 8(topoisomerase inhibitor only) 2nd line CTx Type12 (single taxol) The survival rate of ovary cancer patients decreased from stage 1 to stage 4.Among 1st line CTx type 1 and 2nd line CTx type(1 or 4) patients, those who used PARPi in 2nd line maintenance CTx(n=14) had a higher death rate than those who did not receive maintenance CTx or received that other than PARPi(hazard ratio 1.44). In the 1st line CTx 1~4 group, we divided patients according to 2nd line CTx type. We compare 2nd line CTx type 5 group(n=30) with type 6+8+12 group(n=26). The death rate was of type 5 group was higher than type 6+8+12 group. And Overall survival of 2nd line CTx type 5 group was 22 months, that of 2nd line CTx type 6+8+12 group was 26 months. Conclusion: When changing the chemotherapy regimen in the recurrence of ovarian cancer, the survival rate or overall survival may vary depending on the order in which the regimen is used. If we collect patients data more broadly, the predictive power will be better. Citation Format: Seongeun Pak, Youn Jin Choi. The precision chemotherapy to improve the epithelial ovarian cancer prognosis. [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 4401.