Breast Cancer

Expert insights into the evolving therapeutic landscape for early-stage breast cancers, emphasizing targeted therapies and genomic testing for personalized treatment paradigms.

Tucatinib, which inhibits phosphorylation of HER2/3 resulting in inhibition of downstream MAPK and AKT signaling and cell proliferation, has shown promise for patients with brain metastases as the small molecule inhibitor of HER2 can cross the blood-brain barrier.

Adam M. Brufsky, MD, PhD, FACP, discusses the significance of the FDA approval of capivasertib in combination with fulvestrant for patients with hormone receptor-positive, HER2-negative, locally advanced or metastatic breast cancer harboring 1 or more PIK3CA, AKT1, or PTEN alterations.

Aditya Bardia, MD, presents key data from biomarker and subgroup analyses of the EMERALD trial.

Experts provides an overview of HR-positive , HER2-negative metastatic breast cancer and current treatment approaches.

Aditya Bardia, MD, MPH, discusses key efficacy results from the phase 3 TROPION-Breast01 trial of datopotamab deruxtecan in hormone receptor–positive, HER2-negative breast cancer.

Sara M. Tolaney, MD, MPH, discusses the real-world efficacy of fam-trastuzumab deruxtecan in patients with HER2-positive or HER2-low metastatic breast cancer, including patients who experienced changes in HER2 status during the treatment course.

Beyond genomic testing, endocrine therapy response should be used to determine whether patients with hormone receptor–positive, HER2-negative, N0-1 early breast cancer.

Neoadjuvant nivolumab and non–anthracycline containing chemotherapy produced promising pathologic complete response rates regardless of whether nivolumab was administered before or during treatment with carboplatin and paclitaxel in patients with stage I to IIB triple-negative breast cancer.

Peter Schmid, MD, PhD, discusses updated event-free survival findings from the phase 3 KEYNOTE-522 trial of neoadjuvant pembrolizumab plus chemotherapy followed by adjuvant pembrolizumab in patients with early-stage triple-negative breast cancer. 

Seema A. Khan, MD, discusses 5-year clinical outcomes from the ECOG-ACRIN E4112 trial, which is evaluating the use of MRI and a 12-gene expression assay to optimize local therapy for patients with ductal carcinoma in situ.

Neoadjuvant pembrolizumab combined with chemotherapy followed by adjuvant pembrolizumab compared with placebo plus chemotherapy continued to show a clinically meaningful improvement in event-free survival in patients with high-risk, early-stage triple-negative breast cancer.

Real-world data support the use of the MammaPrint index as a predictor of neoadjuvant chemosensitivity in patients with hormone receptor–positive, HER2-negative early-stage breast cancer.

Clinical, transcriptomic, and genomic differences that may contribute to aggressive tumor biology were observed between Latin-American and non-Hispanic White patients with breast cancer.

Adjuvant ado-trastuzumab emtansine continued to improve overall survival and invasive disease-free survival vs trastuzumab after 8.4 years of follow-up in patients with HER2-positive early breast cancer and residual invasive disease following neoadjuvant therapy enrolled in the phase 3 KATHERINE trial.

The brain-penetrant oral selective estrogen receptor degrader SIM0270 exhibited a favorable safety profile and early signals of antitumor activity in patients with estrogen receptor-positive, HER2-negative locally advanced or metastatic breast cancer, including those with ESR1 mutations.

A continued statistically significant improvement in iDFS was observed for patients with HR-positive, HER2-negative early-stage breast cancer who received ribociclib plus a nonsteroidal AI vs a nonsteroidal AI alone, according to the final iDFS analysis of the phase 3 NATALEE trial.

Treatment with elacestrant led to a clinically meaningful improvement in progression-free-survival compared with standard-of-care therapy among patients with estrogen receptor–positive/HER2-negative, ESR1-mutated advanced or metastatic breast cancer.

Javier Cortés, MD, PhD, discusses the rationale for analyzing outcomes with trastuzumab deruxtecan in patients with HER2-positive metastatic breast cancer who have brain metastases.

Senthil Damodaran, MD, PhD, discusses the efficacy of futibatinib plus fulvestrant in patients with FGFR1-amplified metastatic hormone receptor–positive, HER2-negative breast cancer according to findings from the phase 2 FOENIX-MBC2 trial.

Anastrozole or fulvestrant plus fam-trastuzumab deruxtecan-nxki demonstrated encouraging antitumor activity in patients with chemotherapy-naïve, HER2-low hormone receptor–positive metastatic breast cancer.

Treatment with trastuzumab deruxtecan generated clinical responses in patients with HER2-low or HER2-positive advanced breast cancer with pathologically confirmed leptomeningeal carcinomatosis.

Datopotamab deruxtecan resulted in a statistically significant and clinically meaningful improvement in progression-free survival compared with chemotherapy among patients with previously treated, hormone receptor-positive/HER2-negative inoperable or metastatic breast cancer.

The addition of inavolisib to palbociclib and fulvestrant improved progression-free survival vs palbociclib and fulvestrant alone in select patients with PIK3CA-mutated, hormone receptor–positive, HER2-negative, locally advanced or metastatic breast cancer.

Precise stratification of hormone receptor–positive, HER2-negative breast cancer using BluePrint and MammaPrint assays revealed comparable 3-year recurrence-free survival rates between Black and White patients despite observed racial differences in the distribution of molecular subtypes.