Fertility sparing surgery for early-stage clear cell carcinoma of the ovary; A systematic review and analysis of obstetric outcomes.

Clear cell carcinoma of the ovary (CCOC), accounts for 5-25% of epithelial ovarian cancer (EOC) cases. A significant proportion of patients with CCOC are of reproductive age, wishing to preserve their fertility. The application of fertility sparing surgery (FSS) in those patients has been extensively criticized, due to the high reported recurrence rates and chemotherapy resistance. The aim of the present study was to accumulate the current knowledge on obstetric and fertility outcomes of patients with early stage CCOC who underwent fertility sparing surgery. A meticulous search of 3 electronic databases was conducted for articles published up to June 2020 relevant in the field using the terms "ovarian cancer", "clear cell", "fertility sparing", "conservative treatment". Studies that reported pregnancy and maternal outcomes after fertility sparing surgery for the management of early stage CCOC were considered eligible. A total of 5 studies which comprised of 60 patients with early stage CCOC, who underwent fertility-sparing surgery, were reviewed. Ten patients (16.6%) had disease recurrence. The total clinical pregnancy rate of 32% with a proportion of 24% of live birth rates in 12 of the included patients. The median interval from surgery to pregnancy was 41.5 months, while no evidence of disease was recorded among the patients who achieved pregnancy. No difference in survival and recurrence rates among patients who underwent fertility-sparing surgery and those who had radical surgical procedures. Fertility-sparing treatment for International Federation of Gynaecology and Obstetrics (FIGO) Stage IA/IC CCOC seems to be an acceptable treatment option for selected premenopausal women who strongly wish to preserve their childbearing potential. However, larger studies are needed to validate the safety of the procedure.