Dewilde K, et al. – A monocentric retrospective review is carried out to ascertain the mucinous borderline ovarian tumors (MBOT) risk factors. In this series of pure intestinal–type MBOT, including micro–invasion, no recurrences were seen. Given the heterogeneity of these tumors staging with at least unilateral salpingo–oophorectomy, extensive pathological sampling, and expert pathological review is of paramount importance to be able to diagnose a pure intestinal–type MBOT and excluding gastrointestinal mucinous tumors and more important, excluding an invasive focus, defining a mucinous ovarian carcinoma. When these conditions are fulfilled, the prognosis of pure intestinal–type MBOT is excellent.