Carcinogenesis, Teratogenesis & Mutagenesis ›› 2023, Vol. 35 ›› Issue (2): 131-138.doi: 10.3969/j.issn.1004-616x.2023.02.009

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Efficacy and prognostic values of two treatments for advanced epithelial ovarian cancers

TAN Jianhua1, LAI Yaozhen2, TANG Lihua3, ZHOU Li3   

  1. 1. Department of Obstetrics and Gynecology of Shantou Third People's Hospital, Shantou 515071;
    2. Shantou University Medical College, Shantou 515041;
    3. Department of Gynecology and Oncology, Cancer Hospital Affiliated to Shantou University Medical College, Shantou 515041, Guangdong, China
  • Received:2022-12-28 Revised:2023-02-23 Published:2023-04-13

Abstract: OBJECTIVE: To compare the efficacy of neoadjuvant chemotherapy followed by interval debulking surgery with primary debulking surgery for advanced epithelial ovarian cancer,and to analyze the influencing factors of the prognosis. METHODS:From January 2010 to December 2019,advanced epithelial ovarian cancer patients (FIGO stage Ⅲ or Ⅳ) who were initially treated at the Department of Cancer Hospital of Shantou University Medical College,106 were selected and divided into two treatment groups:neoadjuvant chemotherapy with interval debulking surgery (NACT-IDS) and primary debulking surgery (PDS). Among the NACT-IDS group,patients were divided into 2 subgroups according to the preoperative chemotherapy cycles: the neoadjuvant chemotherapy ≤2 cycles (NACT-IDS-1) group and the neoadjuvant chemotherapy >2 cycles (NACT-IDS-2) group. Our patients were included into 67 cases in the NACT-IDS group (40 cases in the NACT-IDS-1 group,and 27 cases in the NACT-IDS-2 group) and 39 cases in the PDS group. Information about the general pathological characteristics, intraoperative bleeding, postoperative outcomes, and survival outcomes of the patients were analyzed retrospectively. Survival analysis was used to compare differences in overall survival (OS) and progression-free survival (PFS) between the groups of NACT-IDS and PDS and the two subgroups of NACT-IDS. T-test,chi-square test and Fisher's exact test were used to compare differences in intraoperative bleeding,operative time,and postoperative complications,etc. The Cox proportional hazards model was used to analyze relationships between clinicopathological characteristics and surgery-related characteristics with prognosis. RESULTS:Among the 106 patients,58 (54.7%) died and the median follow-up time was 46 months. The median OS was 44 and 42 months in the NACT-IDS and PDS groups,respectively, and the median PFS was 21 months in both groups. The differences in median OS and median PFS between the NACT-IDS and PDS groups and between the NACT-IDS subgroups were not statistically significant (all P>0.05). Compared with the PDS group, the NACT-IDS group showed significant differences in intraoperative bleeding,operative time,incidence of postoperative complications,and time to start chemotherapy after surgery (all P<0.05). The results of the multivariable COX proportional hazards model showed that residual disease (incomplete resection) versus no residual disease (complete resection) was statistically significant on OS [HR= 2.82, 95% CI(1.20, 6.63), P=0.017]; the effect of normalization of CA-125 after 4 cycles of postoperative chemotherapy was statistically significant on both OS and PFS compared with those who did not [HR=0.39, 95%CI(0.18,0.88),P=0.022;HR=0.34,95%CI(0.17,0.71),P=0.004]. CONCLUSION:NACT-IDS improves the quality of surgery compared with PDS for advanced epithelial ovarian cancer,but does not significantly enhance the overall survival benefit,and suggests early IDS as soon as conditions permit. Residual disease and whether CA-125 recovered to normal after 4 cycles of postchemotherapy were independent prognostic factors affecting OS in advanced epithelial ovarian cancers.

Key words: advanced epithelial ovarian cancer, interval debulking surgery, primary debulking surgery, prognosis

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