TY - JOUR A1 - Müller, Volkmar A1 - Hörner, Manuel A1 - Thill, Marc A1 - Banys-Paluchowski, Maggie A1 - Schmatloch, Sabine A1 - Fasching, Peter A. A1 - Harbeck, Nadia A1 - Langanke, Dagmar A1 - Uhrig, Sabrina A1 - Häberle, Lothar A1 - Fischer, Dorothea A1 - Hein, Alexander A1 - Fehm, Tanja N. A1 - Goossens, Chloë A1 - Terhaag, Jürgen A1 - Heilenkötter, Uwe A1 - Dall, Peter A1 - Rudlowski, Christian A1 - Wuerstlein, Rachel A1 - Aydogdu, Mustafa A1 - Keyver-Paik, Mignon-Denise A1 - Hammerle, Carolin A1 - Deuerling, Natalija A1 - Stickeler, Elmar A1 - Aktas, Bahriye A1 - Belleville, Erik A1 - Thoma, Martin A1 - Ditsch, Nina A1 - Baila, Yasmin A1 - Roos, Christian A1 - Mann, Christian A1 - Iuliano, Caterina A1 - Brucker, Sara Y. A1 - Schneeweiss, Andreas A1 - Hartkopf, Andreas D. T1 - Real-world utilization of aromatase inhibitors, tamoxifen, and ovarian function suppression in premenopausal patients with early hormone receptor-positive, HER2-negative breast cancer with increased recurrence risk T2 - The Breast N2 - Background The optimal adjuvant endocrine treatment in premenopausal patients with hormone receptor-positive, HER2-negative (HRpos/HER2neg) early breast cancer (eBC) remains debated, particularly the choice between aromatase inhibitors plus ovarian function suppression (AI + OFS) or tamoxifen (TAM) with or without additional OFS. This study assessed the use of adjuvant endocrine therapies for premenopausal patients with intermediate/high-risk HRpos/HER2neg eBC. Methods CLEAR-B (AGO-B-059; NCT05870813) was a retrospective study analyzing data, collected from January 2016 to June 2019 and from January 2022 to December 2023 during the certification process of breast centers in Germany. Premenopausal patients with HRpos/HER2neg intermediate/high-risk eBC were eligible. Patient and disease characteristics, in addition to recommended and received adjuvant treatments, were evaluated. Results The number of registered patients was 3137, of whom 2789 had complete information on endocrine treatments (1717 for 2016–2019 and 1072 for 2022–2023). In 2016–2019, 8.4 % of the patients were recommended to be treated with AI + OFS, whereas in 2022–2023, the proportion of patients with a treatment recommendation for AI + OFS rose to 42.1 %. In 2016–2019, TAM monotherapy was most frequently recommended (80.8 %). Conversely, TAM + OFS was not commonly recommended (9.3 % in 2016–2019 and 16.5 % in 2022–2023). While no clear association between tumor stage and chosen endocrine therapy was found in 2016–2019, most patients with ≥stage IIA were recommended to be treated with AI + OFS in 2022–2023. Conclusion This analysis shows that treatment recommendation for AI + OFS in premenopausal patients with HRpos/HER2neg eBC increased relevantly in the past years, reflecting latest guideline recommendations. Y1 - 2025 UR - https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/121389 UR - https://nbn-resolving.org/urn:nbn:de:bvb:384-opus4-1213894 SN - 0960-9776 VL - 81 SP - 104458 PB - Elsevier BV ER -