Real-world treatment patterns and clinical outcomes from a retrospective chart review study of patients with recurrent or advanced endometrial cancer who progressed following prior systemic therapy in Europe

Objective To evaluate real-world treatment patterns and clinical outcomes in recurrent/advanced endometrial cancer patients who progressed following prior systemic therapy in clinical practice in Europe. Design Endometrial Cancer Health Outcomes-Europe (ECHO-EU) is a retrospective patient chart review study. Setting ECHO-EU is a multicentre study conducted in the UK, Germany, Italy, France and Spain. Participants Patients with recurrent/advanced endometrial cancer who progressed between 1 July 2016 and 30 June 2019 following prior first-line systemic therapy were eligible and data were collected until last available follow-up through November 2021. Primary and secondary outcome measures Data collected included patient demographics, clinical and treatment characteristics, and clinical outcomes. Kaplan-Meier analyses were performed since initiation of second-line therapy to estimate time to treatment discontinuation, real-world progression-free survival (rwPFS) and overall survival (OS). Results A total of 475 patients were included from EU5 countries. Median age was 69 years at advanced endometrial cancer diagnosis, 78.7% had stage IIIB–IV disease, 45.9% had Eastern Cooperative Oncology Group status ≥2 at second-line therapy initiation. In second line, a majority of patients initiated either non-platinum-based chemotherapy (55.6%) or endocrine therapy (16.2%). Physician-reported real-world overall response rate (classified as complete or partial response) to second-line therapy was 34.5%, median rwPFS was 7.4 months (95% CI 6.2 to 8.0) and median OS was 11.0 months (95% CI 9.9 to 12.3). Conclusions Patients had poor clinical outcomes with a median OS of <1 year and rwPFS of approximately 7 months, highlighting the significant unmet medical need in pretreated recurrent/advanced endometrial cancer patients. Novel therapies with potential to improve PFS and OS over conventional therapies could provide significant clinical benefit.