The Implications of Recent Datasets for the Current and Future Management of Breast Cancer — An ASCO 2026 Review — Webinar Proceedings

Faculty

TARGET AUDIENCE
This activity is intended for medical oncologists, breast surgeons, radiation oncologists and other healthcare professionals involved in the diagnosis and treatment of breast cancer.

LEARNING OBJECTIVES

• Evaluate recently presented clinical research findings to determine their effect on the current management of localized or metastatic breast cancer.
• Review published research data supporting the use of chemotherapy or antibody-drug conjugate (ADC) therapy in combination with anti-PD-1/PD-L1 antibodies for localized or metastatic triple-negative breast cancer, and use this information to make appropriate treatment recommendations.
• Appraise published efficacy and safety data from randomized clinical trials evaluating CDK4/6 inhibitors for HR-positive localized or metastatic breast cancer in order to appropriately counsel patients regarding the optimal clinical use of these agents.
• Recognize the frequency of PIK3CA/AKT1/PTEN alterations and ESR1 mutations in individuals with HR-positive, HER2-negative metastatic breast cancer (mBC), and employ evidence-based approaches designed to target these aberrations.
• Understand the mechanism of action of, published research findings with and current and future clinical role of oral selective estrogen receptor degraders for HR-positive localized or metastatic breast cancer.
• Evaluate published research findings to effectively inform the selection and sequencing of available therapeutic agents and regimens for patients with HER2-positive localized and metastatic breast cancer.
• Interrogate published Phase III research findings documenting the efficacy of TROP2-directed ADCs for patients with mBC to determine the current and future clinical applicability of these approaches.
• Assess the mechanisms of action of, early data with and ongoing clinical trials evaluating other novel agents and treatment strategies under development for localized and metastatic breast cancer.

ACCREDITATION STATEMENT
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CREDIT DESIGNATION STATEMENT
Research To Practice designates this enduring material for a maximum of 1.75 AMA PRA Category 1 Credits™. Physicians should claim only the credit commensurate with the extent of their participation in the activity.

AMERICAN BOARD OF INTERNAL MEDICINE (ABIM) — MAINTENANCE OF CERTIFICATION (MOC)
Successful completion of this CME activity, which includes participation in the evaluation component and a post-test, enables the participant to earn up to 1.75 Medical Knowledge MOC points in the American Board of Internal Medicine’s (ABIM) Maintenance of Certification (MOC) program. Participants will earn MOC points equivalent to the amount of CME credits claimed for the activity. It is the CME activity provider’s responsibility to submit participant completion information to ACCME for the purpose of granting ABIM MOC credit.

Please note, this program has been specifically designed for the following ABIM specialty: medical oncology.

AMERICAN BOARD OF SURGERY (ABS) — CONTINUOUS CERTIFICATION (CC)
Successful completion of this CME activity, which includes participation in the evaluation component and a post-test, enables the learner to earn credit toward the CME and Self-Assessment requirement(s) of the American Board of Surgery’s Continuous Certification program. It is the CME activity provider’s responsibility to submit participant completion information to ACCME for the purpose of granting ABS credit.

Please note, this program has been specifically designed for the following ABS practice area: complex general surgical oncology.

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HOW TO USE THIS CME ACTIVITY
To receive credit for this activity, the participant should review the CME information, watch the video, complete the post-test with a score of 80% or better and fill out the evaluation.

CONTENT VALIDATION AND DISCLOSURES
Research To Practice (RTP) is committed to providing its participants with high-quality, unbiased and state-of-the-art education and adheres to the ACCME’s Standards for Integrity and Independence in Accredited Continuing Education. Any individuals in a position to control the content of an accredited continuing education activity, including faculty, planners, reviewers and others, are required to disclose all relevant financial relationships with ineligible entities (commercial interests). All relevant financial relationships have been mitigated prior to the commencement of this activity. In addition, all activity content is reviewed by RTP scientific staff and an external, independent physician reviewer for fair balance, scientific objectivity of studies referenced and patient care recommendations.

FACULTY — The following faculty reported relevant financial relationships with ineligible entities:

FACULTY — Dr Bardia — Consulting Agreements: Alyssum Therapeutics, AstraZeneca Pharmaceuticals LP, Daiichi Sankyo Inc, Genentech, a member of the Roche Group, Gilead Sciences Inc, Lilly, Menarini Group, Merck, Novartis, Pfizer Inc, Vyome; Contracted Research (Support to Institution): AstraZeneca Pharmaceuticals LP, Daiichi Sankyo Inc, Genentech, a member of the Roche Group, Gilead Sciences Inc,Lilly, Menarini Group, Merck, Novartis, OnKure Therapeutics, Pfizer Inc. Dr Kalinsky — Consulting Agreements: AstraZeneca Pharmaceuticals LP, Bicycle Therapeutics, Biotheranostics Inc, A Hologic Company, Daiichi Sankyo Inc, Genentech, a member of the Roche Group, Gilead Sciences Inc, Jazz Pharmaceuticals Inc, Lilly, Menarini Silicon Biosystems, Merck, Mersana Therapeutics Inc, Myovant Sciences, Novartis, Pfizer Inc, ProteinQure, Puma Biotechnology Inc, RayzeBio, Regor Therapeutics, Relay Therapeutics, Seagen Inc; Nonrelevant Financial Relationships (Spouse): Stock Options/Stock, Public Companies — Revolution Medicines Inc (prior employee of EQRx), ADC Therapeutics. Dr O’Shaughnessy — Advisory Committees and Consulting Agreements: Aadi Bioscience, Agendia Inc, Amgen Inc, Aptitude Health, AstraZeneca Pharmaceuticals LP, BioNTech SE, Bristol Myers Squibb, Daiichi Sankyo Inc, Duality Biologics, Eisai Inc, Ellipses Pharma, Exact Sciences Corporation, G1 Therapeutics Inc, Genentech, a member of the Roche Group, Gilead Sciences Inc, Guardant Health, HiberCell, Jazz Pharmaceuticals Inc, Johnson & Johnson, Lilly, Menarini Group, Merck, Mersana Therapeutics Inc, Natera Inc, Novartis, Pfizer Inc, Pierre Fabre, Puma Biotechnology Inc, RayzeBio, Roche Laboratories Inc, Sanofi, Seagen Inc, Stemline Therapeutics Inc, Summit Therapeutics, Tempus, TerSera Therapeutics LLC.

MODERATOR — Dr Love is president and CEO of Research To Practice. Research To Practice receives funds in the form of educational grants to develop CME activities from the following companies: Aadi Bioscience, AbbVie Inc, ADC Therapeutics, Agendia Inc, Alexion Pharmaceuticals, Amgen Inc, Array BioPharma Inc, a subsidiary of Pfizer Inc, Arvinas, Astellas, AstraZeneca Pharmaceuticals LP, Aveo Pharmaceuticals, Bayer HealthCare Pharmaceuticals, BeOne, Biotheranostics Inc, A Hologic Company, Black Diamond Therapeutics Inc, Blueprint Medicines, Boehringer Ingelheim Pharmaceuticals Inc, Bristol Myers Squibb, Catalyst Pharmaceuticals Inc, Celcuity, Clovis Oncology, Coherus BioSciences, Corcept Therapeutics Inc, CTI BioPharma, a Sobi Company, Daiichi Sankyo Inc, Eisai Inc, Elevation Oncology Inc, Exact Sciences Corporation, Exelixis Inc, Genentech, a member of the Roche Group, Genmab US Inc, Geron Corporation, Gilead Sciences Inc, GSK, Helsinn Therapeutics (US) Inc, ImmunoGen Inc, Incyte Corporation, Ipsen Biopharmaceuticals Inc, Jazz Pharmaceuticals Inc, Johnson & Johnson, Karyopharm Therapeutics, Kite, A Gilead Company, Kura Oncology, Legend Biotech, Lilly, MEI Pharma Inc, Merck, Mersana Therapeutics Inc, Mirati Therapeutics Inc, Mural Oncology Inc, Natera Inc, Novartis, Novartis Pharmaceuticals Corporation on behalf of Advanced Accelerator Applications, Novocure Inc, Nuvalent, Nuvation Bio Inc, Pfizer Inc, Pharmacyclics LLC, an AbbVie Company, Puma Biotechnology Inc, Regeneron Pharmaceuticals Inc, Revolution Medicines Inc, Rigel Pharmaceuticals Inc, R-Pharm US, Sanofi, Seagen Inc, Servier Pharmaceuticals LLC, SpringWorks Therapeutics Inc, Stemline Therapeutics Inc, Sumitomo Pharma America, Summit Therapeutics, Syndax Pharmaceuticals, Taiho Oncology Inc, Takeda Pharmaceuticals USA Inc, TerSera Therapeutics LLC, Tesaro, A GSK Company, and Verastem Inc.

RESEARCH TO PRACTICE CME PLANNING COMMITTEE MEMBERS, STAFF AND REVIEWERS — Planners, scientific staff and independent reviewers for Research To Practice have no relevant financial relationships to disclose.

This educational activity contains discussion of published and/or investigational uses of agents that are not indicated by the Food and Drug Administration. Research To Practice does not recommend the use of any agent outside of the labeled indications. Please refer to the official prescribing information for each product for discussion of approved indications, contraindications and warnings. The opinions expressed are those of the presenters and are not to be construed as those of the publisher or grantors.

This activity is supported by educational grants from AstraZeneca Pharmaceuticals LP, Celcuity, Daiichi Sankyo Inc, Novartis, and Stemline Therapeutics Inc.

Release date: September 2026
Expiration date: September 2027

Barrios CH et al. ASCENT-03: Efficacy by biomarker subgroup with sacituzumab govitecan (SG) vs chemotherapy (chemo) in participants (pts) with previously untreated advanced triple-negative breast cancer (TNBC) who are not candidates for PD-(L)1 inhibitors (PD-[L]1i). ASCO 2026;Abstract 1014.

Bidard FC et al. First-line (1L) camizestrant (CAMI) for emergent ESR1 mutations (ESR1m) in advanced breast cancer (ABC): Final progression-free survival 2 (PFS2) from the phase III SERENA-6 trial. ASCO 2026;Abstract LBA1007.

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Jhaveri KL et al. Post-progression treatment (tx) analyses of evERA Breast Cancer (BC): A phase III trial of giredestrant (GIRE) + everolimus (E) in patients (pts) with estrogen receptor–positive, HER2-negative advanced BC (ER+, HER2- aBC) previously treated with a CDK4/6 inhibitor (i). ASCO 2026;Abstract 1016.

Jhaveri KL et al. Imlunestrant with or without abemaciclib in advanced breast cancer (ABC): Updated efficacy results from the phase 3 EMBER-3 trial. San Antonio Breast Cancer Symposium 2025;Abstract GS3-08.

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Loi S et al. Trastuzumab deruxtecan (T-DXd) + durvalumab (D) in patients (pts) with previously untreated HER2+ unresectable/metastatic breast cancer (mBC): Final analysis from DESTINY-Breast07. ASCO 2026;Abstract 1012.

McDonald ES et al. GLP-1 agonists are associated with a significant reduction in breast cancer incidence in women. JCO Oncol Pract 2026;22(7):1341-8. Abstract

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Rugo HS et al. Capivasertib (C) and fulvestrant (F) for patients (pts) with HR+/HER2- advanced breast cancer (ABC): Final overall survival (OS) results from the phase III CAPItello-291 trial. ESMO Breast 2026;Abstract 417O.

Rugo HS et al. Real-world outcomes of elacestrant in ER+, HER2-, ESR1-mutant metastatic breast cancer. Clin Cancer Res 2026;32(1):179-87. Abstract

Schmid P et al. Efficacy and safety of giredestrant (GIRE) in patients (pts) with estrogen receptor–positive, HER2-negative early breast cancer (ER+, HER2- eBC) in the phase III lidERA BC clinical trial: Results by menopausal status. ASCO 2026;Abstract 502.

Schmid P et al. Neoadjuvant pembrolizumab or placebo plus chemotherapy followed by adjuvant pembrolizumab or placebo for high-risk early-stage TNBC: Final analysis results from the phase 3 KEYNOTE-522 study. ASCO 2026;Abstract 507.

Stein RC et al. First results from the OPTIMA phase III randomized non-inferiority trial of test-directed chemotherapy in patients with high clinical risk ER-positive HER2-negative early breast cancer. ASCO 2026;Abstract 500.

Tolaney SM et al. ASCENT-04: Analysis of efficacy by biomarker subgroups with sacituzumab govitecan (SG) + pembrolizumab (pembro) vs chemotherapy (chemo) + pembro in participants (pts) with previously untreated PD-L1+ metastatic triple-negative breast cancer (mTNBC). ASCO 2026;Abstract 1013.

Turner NC et al. Giredestrant (GIRE) + palbociclib (PALBO) vs letrozole (LET) + PALBO as first-line (1L) therapy in patients (pts) with estrogen receptor–positive, HER2-negative locally advanced or metastatic breast cancer (ER+, HER2- LA/mBC): Primary analysis of the phase III persevERA BC trial. ASCO 2026;Abstract LBA1006.

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