The significance of comprehensive staging surgery in malignant ovarian germ cell tumors

• Compared with CSS group，USO group had higher surgical security, satisfactory prognosis, considerable pregnancy and birth rate.
• It is safer and more effective for MOGCTs to perform ipsilateral adnexectomy + clinical intraoperative exploration and adjuvant chemotherapy.

ObjectiveTo evaluate the clinical significance of fertility-preserving comprehensive staging surgery (CSS) in the treatment of malignant ovarian germ cell tumors (MOGCTs).MethodsA total of 92 cases of MOGCTs were retrospectively reviewed.ResultsForty-six patients (50%) received CSS, which includes ipsilateral adnexectomy + omentectomy + retroperitoneal lymphadenectomy (appendectomy and multiple biopsies as required). Forty-six patients (50%) received USO, which includes ipsilateral adnexectomy + clinical intraoperative evaluation (including retroperitoneal lymph nodes, great omentum, peritoneal, and contralateral ovary), biopsy of suspicious sites, and excision of all visible lesions. The mean operation time (177.0 vs. 114.8 min; p < 0.0001) and the mean intraoperative blood loss (499.1 ml vs. 112.9 ml; p = 0.04) were significantly higher in the CSS group compared to those in the USO group. The complication rate (17.4% vs 0%, p = 0.003), the relapse rate (10.9% vs 2.2%, p = 0.102) and the mortality rate (4.3% vs 2.2%, p = 0.500) were higher in the CSS group compared to those in the USO group. The difference in complication rate was statistically significant. The overall 5 year survival rates were 92% and 97% in the CSS and USO groups, respectively (p = 0.575). Tumor-free survival rates at 5 years were 87% and 97% in the CSS and USO groups, respectively (p = 0.115).ConclusionsThe benefit of fertility-preserving CSS to MOGCT patients was not greater than that of USO. It is safer and more effective to perform ipsilateral adnexectomy + clinical intraoperative exploration surgery (including retroperitoneal lymph nodes, great omentum, peritoneal, and contralateral ovary), biopsy of suspicious sites, excision of all visible lesions, and adjuvant chemotherapy.