To date, no level A evidence comparing fertility sparing surgery (FSS) and radical comprehensive surgery (RCS) is available. The low proportion of young women diagnosed in the early stage of disease and ethical concerns are the main factor limiting the execution of a randomized trial comparing these two approaches. Growing evidence suggests that after comprehensive staging, FSS is a safe and effective procedure in low-risk ovarian cancer patients, those classified as stage IA and IB, grade 1 or 2 (according to the International Federation of Obstetricians and Gynecologists, FIGO) [23456]. However, accumulating data support that FSS staging may be safe in high-risk early stage ovarian cancer (stage IC or stage IA or IB grade 3 ovarian cancer). Although a few authors reported concerns on the application of FSS in high-risk early stage ovarian cancer, no evidence support that the execution of RCS overcomes outcomes of a conservative treatment in young women [245].

Recently, Utrilla-Layna and Zapardiel [7] published a letter questioning the role of FSS in high-risk early stage ovarian cancer patients. Albeit FSS can not be considered as the standard treatment for these patients, their concerns are supported by any level of evidence. In particular, several investigations suggested that a conservative approach might be applied without long-term oncologic detriments [7]. Obviously, we acknowledge that patients affected by high-risk ovarian cancer experience bear worse oncologic outcomes than patients with low-risk ovarian cancer. However, a recently published investigation from our study group including more than 300 patients affected by early stage ovarian cancer, suggested the safety of conservative approach in early stage ovarian cancer. Moreover, a sub-analysis of our data suggested that the execution of FSS rather than RCS does not influence outcomes of high-risk ovarian cancer [2]. Using a propensity-matched comparison (in order to minimize possible selection bias) we observed that high-risk ovarian cancers are characterized by similar disease-free and overall survivals than patients undergoing RCS [2]. Similarly, data of 221 patients, undergoing FSS in 30 institutions (belonging to the Gynecologic Cancer Study Group of the Japan Clinical Oncology Group), suggested that stage IC ovarian cancer or patients with unfavorable histology (e.g., clear cell) may benefit from conservative approach [5]. In agreement with others, this study reported that salvage therapy following local (ovarian) recurrence is highly effective, achieving an excellent oncologic control [56].

Therefore, owing the current evidence and the impact of RCS on quality of life of young women who wish to preserve their childbearing potential and endocrine function, we believe that FSS should not also be denied in high-risk ovarian cancer. Depriving a young woman of her reproductive function with unnecessary surgical procedures should be a real source of concerns. Accurate counseling and a strict follow-up are needed. Further multi-institutional prospective well-designed studies are warranted in order to improve patients' oncologic outcomes and their quality of life.