ESMO 2026 Top 10 trials to watch
Madrid, October 23–27, 2026
Top 10 trials to watch
For each tumor group, the ten trials our faculty were watching in Madrid.
- Abstract LBA50PANKU-BREAST01Izalontamab brengitecan (IZA-BREN) in previously treated unresectable locally advanced or metastatic HR+/HER2− breast cancer. Randomized phase 3 study.
- Abstract 1842OFOURLIGHT-1Atirmociclib plus fulvestrant in HR+/HER2− advanced or metastatic breast cancer following progression on a prior CDK4/6 inhibitor. Randomized phase 2 study.
- Abstract LBA25NATALEEAdjuvant ribociclib plus a nonsteroidal aromatase inhibitor in HR+/HER2− early breast cancer. Six-year overall survival and efficacy outcomes.
- Abstract LBA27APEX-BREAST01TQB2102 versus chemotherapy in HER2-low recurrent or metastatic breast cancer. Randomized phase 3 study.
- Abstract LBA51KEYNOTE-B49Pembrolizumab versus placebo, both combined with chemotherapy, in HR+/HER2− advanced breast cancer. Randomized, double-blind phase 3 study.
- Abstract LBA13HORIZON-BREAST06Trastuzumab rezetecan (SHR-A1811) in HER2-low advanced breast cancer. Randomized phase 3 study.
- Abstract LBA26POP-DURVAShort-term preoperative durvalumab for stage I triple-negative breast cancer (TNBC). First results from the phase 2 UNLOCK 14 study.
- Abstract 4ROSWITCHTarget switching with conserved-payload novel antibody-drug conjugates (ADCs) in metastatic breast cancer following prior ADC therapy. Prospective, open-label phase 2 platform trial.
- Abstract 1ROpostMONARCHAbemaciclib plus fulvestrant versus placebo plus fulvestrant in HR+/HER2− advanced breast cancer following progression on a prior CDK4/6 inhibitor plus endocrine therapy. Phase 3 overall survival results.
- Abstract LBA49DESTINY-Breast09Trastuzumab deruxtecan plus pertuzumab versus taxane plus trastuzumab plus pertuzumab in HER2+ advanced or metastatic breast cancer with baseline brain metastases. DESTINY-Breast09 analysis.


