Neil P. Johnson

Purpose: Relugolix is an oral, non-peptide gonadotropin-releasing hormone receptor antagonist administered as once-daily combination therapy (relugolix-CT; 40 mg relugolix, 1 mg estradiol, 0.5 mg norethindrone acetate) to reduce endometrios…

PURPOSE: Relugolix is an oral, non-peptide gonadotropin-releasing hormone receptor antagonist administered as once-daily combination therapy (relugolix-CT; 40 mg relugolix, 1 mg estradiol, 0.5 mg norethindrone acetate) to reduce endometrios…

BACKGROUND: Despite the availability of endometriosis care guidelines from multiple governmental and professional organisations, their global applicability and recommendations have been insufficiently examined. This scoping review examines …

This group was formed out of the conviction that endometriosis research has not progressed at a pace in proportion to disease severity and the negative impact on women's quality of life. Furthermore, advancement in our understanding of this…

OBJECTIVE: To examine factors associated with fertility following hysterosalpingography (HSG) using an oil-soluble contrast medium (OSCM). DESIGN: In a prospective cohort study on 196 women undergoing OSCM HSG, we showed that iodine excess…

STUDY QUESTION: What is the efficacy and safety of long-term treatment (up to 2 years) with relugolix combination therapy (CT) in women with moderate to severe endometriosis-associated pain? SUMMARY ANSWER: For up to 2 years, treatment wit…

WHAT IS THIS SUMMARY ABOUT?: This is a summary of research studies (known as clinical trials) called SPIRIT 1 and SPIRIT 2. The SPIRIT 1 and SPIRIT 2 studies compared how well a medicine called relugolix combination therapy worked in reliev…

INTRODUCTION: Relugolix combination therapy (Relugolix-CT: relugolix 40 mg, estradiol 1 mg, norethindrone acetate 0.5 mg) significantly improved endometriosis-associated pain versus placebo in the SPIRIT 1&2 studies. Efficacy was maintained…

STUDY QUESTION: Which classification system for endometriosis do clinicians use most frequently, and why? SUMMARY ANSWER: Even with a high uptake of the three existing endometriosis classification systems, most clinicians managing endometr…

OBJECTIVE: In the field of endometriosis, several classification, staging and reporting systems have been developed, but do clinicians routinely use these classification systems, which system do they use and what are the clinicians' motivat…

BACKGROUND: Endometriosis is a common cause of pelvic pain in women, for which current treatment options are suboptimal. Relugolix, an oral gonadotropin-releasing hormone receptor antagonist, combined with estradiol and a progestin, was eva…

STUDY QUESTION: Can a set of terms and definitions be prepared on endometriosis that would be the basis for standardization in disease description, classification and research? SUMMARY ANSWER: The current paper outlines a list of 49 terms …

OBJECTIVE: Different classification systems have been developed for endometriosis, using different definitions for the disease, the different subtypes, symptoms and treatments. In addition, an International Glossary on Infertility and Ferti…

BACKGROUND: Endometriosis-specific (advanced gynaecological) ultrasound is recommended as part of preoperative work-up of women with suspected endometriosis. AIM: To evaluate the awareness and utilisation of advanced gynaecological ultraso…

STUDY QUESTION: Which endometriosis classification, staging and reporting systems have been published and validated for use in clinical practice? SUMMARY ANSWER: Of the 22 endometriosis classification, staging and reporting systems identif…

OBJECTIVE: In the field of endometriosis, several classification, staging and reporting systems have been developed. Which endometriosis classification, staging and reporting systems have been published and validated for use in clinical pra…

Iodine is a vital micronutrient and its importance in thyroid function is well established. However, abnormalities in iodine intake may also have other effects. In particular, iodine is taken up avidly by the ovary and endometrium. Iodine d…

COVID-19 has led to new obstacles in the care for women with endometriosis. With many centers around the globe temporarily ceasing outpatient appointments, diagnostic imaging for non-acute pelvic pain, surgery for endometriosis, and fertili…

We are proposing a shift in mindset in the field of endometriosis, whereby care for patients with endometriosis mirrors that of patients with gynaecological cancer. To achieve this, we advocate for the recognition of complex benign gynaecol…

The care of patients with endometriosis has been complicated by the coronavirus disease 2019 (COVID-19) pandemic. Medical and allied healthcare appointments and surgeries are being temporarily postponed. Mandatory self-isolation has created…

OBJECTIVE: We performed a systematic review and meta-analysis with the aim to answer whether operative laparoscopy is an effective treatment in a woman with demonstrated endometriosis compared with alternative treatments. Moreover, we aimed…