Systematic Review of the Survival Outcomes of Neoadjuvant Chemotherapy in Women with Malignant Ovarian Germ Cell Tumors

Simple Summary This systematic review was conducted using four public electronic databases (PubMed, Web of Science, Scopus, and the Cochrane Central Register of Controlled Trials) from the date of inception to 31 May 2023, and 10 original articles with information regarding neoadjuvant chemotherapy (NACT) for malignant ovarian germ cell tumors (MOGCT) were identified. The results of the meta-analysis showed that NACT was used in approximately 40% of advanced MOGCT cases, with a response rate of 95.8%. The uterine preservation rate was approximately 70%, and the cumulative resumed menstruation rate was 100% (n = 30). Four comparator studies evaluating NACT versus primary debulking surgery between the groups showed similar overall survival, disease-free survival, recurrence rate, and adverse event rate (grade 3-4) from chemotherapy. Although available data are limited and level I evidence is lacking, we believe that NACT may be feasible for advanced MOGCT. Further studies are required to confirm this study's results.Abstract Randomized clinical trials assessing the efficacy of neoadjuvant chemotherapy (NACT) for advanced epithelial ovarian cancer have predominantly included women with high-grade serous carcinomas. The response rate and oncological outcomes of NACT for malignant ovarian germ cell tumors (MOGCT) are poorly understood. This study aimed to examine the effects of NACT on women with MOGCT by conducting a systematic review of four public search engines. Fifteen studies were identified, and a further descriptive analysis was performed for 10 original articles. In those studies, most women were treated with a bleomycin, etoposide, and cisplatin regimen, and one to three cycles were used in most studies. Four studies comparing NACT and primary debulking surgery showed similar complete response rates (n = 2; pooled odds ratio [OR] 0.90, 95% confidence interval [CI] 0.15-5.27), comparable overall survival (n = 3; 87.0-100% versus 70.0-100%), disease-free survival (n = 3; 87.0-100% versus 70.0-100%), recurrence rate (n = 1; OR 3.50, 95%CI 0.38-32.50), and adverse events rate from chemotherapy between the groups. In conclusion, NACT may be considered for the management of MOGCT; however, possible candidates for NACT use and an ideal number of NACT cycles remain unknown. Further studies are warranted to validate the efficacy of NACT in advanced MOGCT patients.