San Antonio Breast Cancer Symposium

A regimen using the PD-L1 inhibitor atezolizumab in the neoadjuvant and adjuvant settings did not improve outcomes in patients with triple-negative breast cancer.

The phase 3 EMBER-3 trial showed imlunestrant improved PFS over SOC endocrine therapy in ER-positive, HER2-negative advanced breast cancer with ESR1 mutations, though not significantly in the overall population.

A phase 2 trial showed ctDNA detection in HR-positive early breast cancer was linked to larger tumors, higher residual cancer burden, and increased recurrence after neoadjuvant endocrine therapy.

An analysis of phase 3 trials found tamoxifen significantly reduced 15-year ipsilateral breast recurrence in patients with “good risk” DCIS treated without radiation therapy.

In the phase 3 EUROPA trial, exclusive postoperative radiation therapy led to better health-related quality of life and fewer treatment-related adverse events in older patients with stage I luminal-like breast cancer at 24 months.

Hope S. Rugo, MD, FASCO, discusses how the combination of elacestrant and abemaciclib compares with other treatment options for patients with advanced breast cancer, whether estrogen receptor-positive or HER2-negative.

Progression-free survival was superior with first-line maintenance of palbociclib in HR-positive, HER2-positive metastatic breast cancer.

A study of 9,146 patients found no OS difference among first-line CDK4/6 inhibitor combinations for HR+/HER2- metastatic breast cancer, presented at SABCS 2024.

Virginia G. Kaklamani, MD, DSc, discusses how effective elacestrant (Orserdu) is in CDK4/6 inhibitor-naive estrogen receptor-positive/HER2-negative metastatic breast cancer treatment.

In the phase 2 SOLTI VALENTINE trial, patritumab deruxtecan with or without letrozole showed similar efficacy to multiagent chemotherapy in HR-positive, HER2-negative breast cancer with fewer severe adverse events.

Adjuvant olaparib continued to show a strong efficacy benefit in patients with BRCA1/2 mutation–positive, HER2-negative high-risk breast cancer, according to 6-year data from the OlympiA trial.

SHR-A1811 showed promising antitumor activity and acceptable tolerability in patients with HER2-positive breast cancer, according to results of the phase 2 FASCINATE-N trial.

T-DXd improves progression-free survival vs physician’s choice, regardless of time to progression or endocrine resistance, in HR-positive, HER2-low/-ultralow metastatic breast cancer.

An exploratory analysis of the KEYNOTE-522 study presented at the 2024 San Antonio Breast Cancer Symposium highlights predictive biomarkers for improved triple-negative breast cancer outcomes.

Aditya Bardia, MD, MPH, FASCO, discusses how fam-trastuzumab deruxtecan-nxki compares with physician’s choice of chemotherapy in estrogen receptor-positive/HER2-low breast cancer.

Immediate surgery significantly lowered local recurrence rates in elderly patients with breast cancer compared with delayed surgery, according to a meta-analysis presented at SABCS 2024.

Gabriel Hortabagyi, MD, provides an update on data from the phase 3 NATALEE trial of ribociclib and endocrine therapy in patients with 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.

Findings from the ADAPTcycle trial suggest that endocrine therapy plus ovarian suppression can generate high response rates in patients with hormone receptor-positive early breast cancer, regardless of age.

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.

The addition of atezolizumab to neoadjuvant trastuzumab plus pertuzumab (HP) and chemotherapy led to a numerical, but not statistically significant, increase in pathologic complete response vs HP/chemotherapy alone in patients with HER2-positive operable breast cancer.

Preliminary study results examining the bispecific antibody, CDK4/6 inhibitor, and hormone therapy combination in patients with advanced breast cancer were presented at SABCS.

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.

The MammaPrint and BluePrint tests may be able to predict which patients with HR-positive, HER2-negative breast cancer are most likely to respond to neoadjuvant chemotherapy.

After more than 8 years of follow-up, T-DM1 continued to improve invasive disease-free survival and overall survival in patients with HER2-positive early breast cancer that had residual invasive disease.

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.

Adjuvant ribociclib plus standard non-steroidal aromatase inhibitors improved invasive disease-free survival in HR-positive, HER2-negative early breast cancer, compared with nonsteroidal aromatase inhibitors alone.

Improvement in progression-free-survival was demonstrated across all relevant subgroups in patients with ER-positive/HER2-negative, ESR1-mutated advanced or metastatic breast cancer.

Stephanie L. Graff, MD, discusses what a community oncologist should know about her presentation on the Signatera assay in patients with hormone receptor-positive, HER2-negative, node-positive, high-risk early breast cancer after adjuvant abemaciclib and endocrine therapy.

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