Innovative Medical Treatments for Endometriosis

Abstract

This presentation will focus on the following innovative areas in medical treatments for endometriosis. Where were we, say, a decade ago compared to where we are now? What diagnostic techniques should we employ to define the population we should treat? Does gold standard surgical treatment help patients avoid unwanted medical treatment - or should it now be the other way round? Do we still believe that medical treatment is not indicated for infertility related to endometriosis? What are the genuinely evidence-based innovative medical treatments for endometriosis? Consensus statements and guidelines represent a clear line in the sand of what may be considered gold standard practice of the time – the World Endometriosis Society’s consensus on current management of endometriosis (2013) 1 provides a good perspective on where we were around a decade ago; the ESHRE Guideline (2022) 2 reflects best practice today. There is growing consensus that a laparoscopic (+/- histological) diagnosis is no longer practical, or indeed needed, in most cases to implement the whole gamut of medical treatment, even though the entire evidence base for treating endometriosis hinges on laparoscopic diagnosis. Hence, “in 2023, there is a strong case for treatment of endometriosis to be based on a clinical diagnosis of ‘likely endometriosis’ supported by imaging findings, when appropriate, in lieu of a traditional diagnosis by laparoscopy +/- histology”. Following laparoscopic surgery, those not intending to conceive should consider the levonorgestrel intrauterine system or combined oral contraceptive pill for at least 18-24 months to reduce the recurrence of endometriosis-related pain symptoms; 2 following surgery for either endometriomas or deep endometriosis, long term hormone therapy should be considered to reduce the chance of recurrence.2 Given the respective evidence bases, progestin hormone therapy may be preferable to the combined oral contraceptive pill to turn the tide of increasing prevalence of endometriosis. 3 While medical treatment has not been recommended to improve fertility, indeed a delaying effect on fertility through medical treatment has traditionally been highlighted, innovative analysis methods, including network meta-analysis, have raised the question whether some medical treatments (dydrogesterone and GnRH agonists) might benefit fertility – and this is merit-worthy of further investigation. GnRH antagonists and aromatase inhibitors are the innovative medical treatments that have shifted from ‘showing potential’ to ‘recommended’, so we will delve into the data supporting this to discover that, for aromatase inhibitors, this remains far from convincing, but for GnRH antagonists, these present a genuine innovative medical treatment option for those suffering from endometriosis.