Borderline ovarian tumors: a retrospective cohort study on single institution experience, practice patterns and outcomes.

Borderline ovarian tumours (BOTs) commonly affect young nulliparous women, thus making fertility-preserving approaches more desirable. Women who opt for conservative management should be counselled about disease recurrence. In this retrospective study, the medical records of 57 women with BOT treated at the American University of Beirut Medical Centre between January 1986 and May 2018 were reviewed. Clinical, pathologic, and demographic data were collected and analysed to identify variables associated with poor clinical outcomes including advanced disease and risk of recurrence. Younger and nulliparous women were more likely to undergo fertility-sparing surgery. The open approach was adopted for women with larger adnexal masses and was associated with more blood loss with a mean difference of 172 mL (95% CI [110-235], -value < .001) but no significant difference in operative time and length of hospital stay compared to the laparoscopic approach. CA-125 correlated with an advanced International Federation of Gynaecology and Obstetrics (FIGO) stage ( = .004). The recurrence rate was found to be 7% with a median recurrence time of 41.5 months.IMPACT STATEMENT BOTs are common in young nulliparous women who often desire fertility-sparing procedures. Prognostic factors associated with disease severity and recurrence remain controversial. This study presents an opportunity to understand the disease behaviour and compare local practices and outcomes to what was reported in the literature. CA-125 appears to be a useful marker in predicting the stage of BOT. Future research should focus on exploring whether BOTs with micropapillary features represent an aggressive histologic subtype more prone to recurrence.