San Antonio Breast Cancer Symposium

Long-term clinical data failed to show a benefit of neoadjuvant olaparib (Lynparza) plus paclitaxel vs carboplatin plus paclitaxel in patients with HER2-negative early breast cancer with homologous recombination deficiency.

The addition of cemiplimab and REGN3767 to paclitaxel improved pathologic complete response vs paclitaxel alone in patients with triple-negative and hormone receptor–positive, HER2-negative breast cancer, according to data from the phase 2 I-SPY2 trial.

Mafalda Oliveira, MD, PhD, discusses the examination of camizestrant vs fulvestrant in estrogen receptor-positive, HER2-negative advanced breast cancer.

Trastuzumab deruxtecan, both as monotherapy and in combination with pertuzumab, displayed encouraging efficacy with no new safety signals among patients with HER2-positive metastatic breast cancer, according to findings from the dose expansion part of the phase 1b/2 DESTINY-Breast07 trial.

William Jacot, MD, PhD, discusses updated efficacy and safety results from the phase 2 AMALEE trial.

Using circulating tumor cell count as a guide to first-line treatment, either with chemotherapy or endocrine therapy, resulted in an improvement in overall survival compared with physician’s choice of treatment without CTC count for patients with metastatic, hormone receptor–positive/HER2-negative breast cancer.

Treatment with the oral selective estrogen receptor degrader elacestrant following treatment with CDK4/6 inhibitors improved progression-free survival outcomes vs standard care options in patients with estrogen receptor-positive, HER2-negative metastatic breast cancer.

Palbociclib plus fulvestrant did not elicit a progression-free survival benefit vs fulvestrant alone in patients with estrogen receptor–positive/HER2-negative breast cancer who had progressed on prior treatment with a CDK4/6 inhibitor and aromatase inhibitor.

ARV-471 monotherapy elicited a significant clinical benefit rate in patients with estrogen receptor–positive/HER2-negative locally advanced or metastatic breast cancer who had undergone prior hormonal therapy and chemotherapy, including those with ESR1 mutations.

Two separate doses of single-agent camizestrant monotherapy improved progression-free survival vs standard-of-care fulvestrant in patients with estrogen receptor-positive, HER2-negative advanced breast cancer.

Aditya Bardia, MD, MPH, discusses the use of elacestrant in patients with estrogen receptor–positive, HER2-negative metastatic breast cancer.

The combination of capivasertib plus fulvestrant significantly improved progression-free survival vs fulvestrant alone in patients with hormone receptor–positive/HER2-negative advanced breast cancer, including those with AKT pathway–altered tumors.

The safety profile for the combination of tucatinib, trastuzumab, and capecitabine from the phase 3 HER2CLIMB trial was confirmed with real-world data for patients with HER2-positive metastatic breast cancer.

Sara A. Hurvitz, MD, discusses updated survival data with fam-trastuzumab deruxtecan-nxki in HER2-positive, unresectable/metastatic breast cancer.

Eribulin mesylate demonstrated a trend toward improved outcomes vs other chemotherapy options of physician’s choice in patients with HER2-low or HER2-0 metastatic breast cancer who were previously treated with at least 1 chemotherapy.

Patients with non-metastatic breast cancer undergoing treatment who added yoga to conventional exercises experienced improvements in disease-free survival, overall survival, and long-term quality of life vs those who did conventional exercises alone.

Patients with HER2-positive metastatic breast cancer experienced a significant survival benefit when treated with fam-trastuzumab deruxtecan compared with trastuzumab emtansine.

Neoadjuvant treatment with trastuzumab deruxtecan showed promising responses in patients with early-stage breast cancer.

Trastuzumab deruxtecan demonstrated a 64% reduction in the risk of disease progression or death compared with physician's choice of treatment in patients with advanced HER2-positive unresectable and/or metastatic breast cancer who previously received ado-trastuzumab emtansine.

Yara Abdou, MD, discusses racial disparities in breast cancer outcomes in patients enrolled to the phase 3 RxPONDER trial.

Ian Krop, MD, PhD, discusses findings from the phase 3 DESTINY-Breast02 trial in patients with HER2-positive metastatic breast cancer.

The Breast Cancer Index test reliably identified premenopausal women undergoing adjuvant endocrine therapy for early-stage, hormone receptor–positive breast cancer who would derive benefit from the addition of ovarian function suppression.

Non-Hispanic Black patients with hormone receptor–positive/HER2-negative breast cancer were more likely to have worse outcomes vs non-Hispanic White, Asian, and Hispanic patients, according to an analysis of the phase 3 RxPONDER trial.

A clinically meaningful improvement in invasive disease-free survival and distant relapse-free survival was observed with the addition of adjuvant abemaciclib to endocrine therapy in patients with hormone receptor–positive, HER2-negative, node-positive early breast cancer, according to results of a prespecified overall survival analysis of the monarchE study.

The addition of 1 year of everolimus to adjuvant endocrine therapy did not demonstrate a statistically significant improvement in invasive disease-free survival or overall survival in patients with high-risk, hormone receptor–positive, HER2-negative breast cancer.

The combination of ribociclib plus endocrine therapy yielded a 46% reduction in the risk of disease progression or death compared with chemotherapy in pre/perimenopausal patients with aggressive hormone receptor–positive/HER2-negative advanced breast cancer.

Chemotherapy prior to treatment with endocrine therapy could increase the risk of cancer-related cognitive impairment compared with endocrine therapy alone in women with breast cancer, irrespective of menopausal status.

Tumor microenvironment of metastasis doorway density—a biomarker of distant metastatic recurrence—is higher in Black women vs White women with estrogen receptor–positive/HER2-negative breast cancer who have residual disease after neoadjuvant chemotherapy.

Data presented from the INSEMA trial during the 2021 San Antonio Breast Cancer Symposium indicated that patients with early-stage breast cancer had better quality of life outcomes when forgoing a sentinel lymph node biopsy and axillary lymph node dissection. However, patients had improved arm symptoms and functioning with SLNB vs ALND.

Neratinib (Nerlynx) induced positive overall response rates in patients with heavily pretreated hormone receptor–positive/HER2-negative, HER2-mutant metastatic breast cancer when combined with fulvestrant and trastuzumab, and also in patients with metastatic HER2-mutant triple-negative breast cancer when combined with trastuzumab.