Abstract P6-18-08: Everolimus + exemestane for HR+ advanced breast cancer in routine clinical practice- Final results from the non-interventional trial, BRAWO

Abstract

Abstract Background: In the pivotal BOLERO-2 trial, everolimus (EVE) + exemestane (EXE) more than doubled the median progression-free survival (PFS) vs EXE alone in hormone receptor positive (HR+), human epidermal growth factor-receptor 2-negative (HER2-) advanced breast cancer (ABC) recurring/progressing on/after prior non-steroidal aromatase inhibitors (NSAIs). BRAWO is a German non-interventional study conducted in patients (pts) with HR+, HER2–ABC receiving EVE + EXE, according to Summary of Product Characteristics (SmPC), in routine clinical practice. Here we report the final PFS and safety results. Methods: This multicenter study documented 2100 pts between October 2012 and December 2017 across 341 sites in Germany. Postmenopausal women with HR+, HER2– ABC with recurrence or progression after a NSAI were included. Primary observation parameters included the evaluation of the effectiveness of EVE + EXE used in routine care for the entire pt group. Results: In the final analysis, out of the 2100 documented pts, 2074 were included in the full analysis set. The median time since the primary diagnosis was 7.1 years and the median time from first sign of relapse (local recurrence or distant metastases) was 2.1 years. At baseline, 54.1% of pts presented with visceral metastases and 50.1% had an ECOG performance status of 0. Approximately, 63% of pts started with EVE 10 mg (median duration of exposure: 5.1 months; 95% CI, 4.6-5.4), while 34.1% started with EVE 5 mg (median duration of exposure: 4.6 months; 95% CI, 4.1-5.2). The distribution of treatment lines was as follows: first line, 28.7% (n=595); second line, 31.9% (n=662); third line, 18.1% (n=376); fourth line, 10.7% (n=221) and, fifth line and later, 10.6% (n=220). Treatment was discontinued by 55.7% of pts (n=1170) due to progressive disease and 26% of pts (n=546) due to adverse events. The Kaplan-Meier estimate of the median PFS was 6.6 months (95% CI, 6.2-7.0). The best overall responses, based on clinical routine, were complete response, 0.8% (n=17), partial response, 7.4% (n=150), and stable disease, 41.3% (n=842). The general safety profile was consistent with the previously reported safety findings. The most common adverse events were stomatitis (any grade: 42.6%, grade 3: 3.8%, grade 4: <0.1%) and fatigue (any grade: 19.8%, grade 3: 1.5%). Conclusions: Data from BRAWO support EVE + EXE as a suitable treatment option with a reasonable safety profile for HR+, HER2− ABC recurring or progressing on/after prior NSAIs. Citation Format: Lüftner D, Schuetz F, Schneeweiss A, Grischke E-M, Bloch W, Decker T, Uleer C, Salat C, Förster F, Schmidt M, Mundhenke C, Tesch H, Jackisch C, Fischer T, Guderian G, Hanson S, Fasching P. Everolimus + exemestane for HR+ advanced breast cancer in routine clinical practice- Final results from the non-interventional trial, BRAWO [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P6-18-08.