16/06/2026
Here is a useful paper from Javier Mejia-Gomez and colleagues on borderline ovarian tumours (BOTs) and use of hormone replacement therapy (HRT).
These tumours account for approximately 15% of primary ovarian neoplasms.
This systematic review evaluated the association between HRT use and BOT outcomes and 11 studies met the inclusion criteria (four cohort, seven case–control). Six reported a statistically significant association between HRT and increased odds of BOTs; five did not. Combined oestrogen–progestogen therapy showed a stronger, more consistent positive association (odds ratio 1.426, 95% confidence interval 1.083–1.877), whereas oestrogen-only therapy showed a nonsignificant association. The findings possibly hint at differential actions of two hormones on the ovarian epithelium. No study addressed BOT recurrence, and only one observational study evaluated BOT survival, finding no adverse association.
The authors concluded that evidence on HRT–BOT association is heterogeneous and inconsistent. Although a statistical association was observed between combined HRT use and increased odds of BOTs, postsurgical safety data are limited and overall certainty of evidence is very low so findings warrant considerable caution. Current literature is insufficient to confirm or exclude an association between HRT and BOT recurrence or survival. Indications for HRT after BOT surgery require individualised, multidisciplinary discussion involving oncology and menopause specialists, balancing quality-of-life benefits against unquantified theoretical risks.
There are significant limitations of the study -
studies included were heterogenous, there was inability to assess any impact of HRT on recurrence and survival by formulation type, dosage or differences in route of administration, possibility of publication bias and there were limited number of studies contributing to subgroups. There was heterogeneity in MHT exposure definitions across studies and potential confounding by indication cannot be excluded.
The BGCS BMS menopause and cancer guidelines currently support use of HRT after BOT depending on the nature and extent of disease.
https://www.bgcs.org.uk/wp-content/uploads/2024/08/BGCS-BMS-Guidelines-on-Management-of-Menopausal-Symptoms-after-Gynaecological-Cancer.pdf
This paper again demonstrates some of the uncertainties that may be associated with decision making about HRT following some forms of tumours or cancers. Individualisation is key and informed patient choice should be respected. More research is the need of the hour……..
Future prospective research, ideally randomised controlled trials, are required to establish the evidence base for the safe management of surgical menopause in this population.
https://www.tandfonline.com/doi/full/10.1080/13697137.2026.2675561