San Antonio Breast Cancer Symposium

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. 

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.

Zanidatamab in combination with palbociclib and fulvestrant resulted in positive progression-free survival outcomes and exhibited an acceptable safety profile in patients with hormone receptor–positive, HER2-positive metastatic 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.

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.

Stephanie L. Graff, MD, discusses findings from a pilot study exploring the association between disease recurrence and circulating tumor DNA positivity in patients with hormone receptor–positive, HER2-negative, node-positive, high-risk, early breast cancer who have received adjuvant treatment of abemaciclib and endocrine therapy.

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.

Administration of fam-trastuzumab deruxtecan significantly prolonged time-to-next treatment in patients with HER2-positive or HER2-low metastatic breast cancer, including patients who experienced changes in HER2 status during the treatment course.

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.

Jason Jincong Freeman, discusses mortality differences across various racial groups in male patients with stage I, II, or III breast cancer.

Heather A. Parsons, MD, MPH, discusses the correlation between liquid biopsy and HER2 status in breast cancer, according to data from a novel epigenomic platform.

The addition of tucatinib to ado-trastuzumab emtansine (T-DM1) significantly improved progression-free survival vs placebo plus T-DM1 in patients with previously treated HER2-positive metastatic breast cancer, including those with brain metastases.

Pembrolizumab plus olaparib did not improve progression-free or overall survival vs pembrolizumab plus chemotherapy in patients with locally recurrent inoperable or metastatic triple-negative breast cancer who received induction pembrolizumab plus chemotherapy.

The phase 2 BBI-20231001 trial evaluating the Boltbody immune-stimulating antibody conjugate BDC-1001 with or without pertuzumab in patients with HER2-positive breast adenocarcinoma is open for enrollment in the United States, France, Italy, and Spain.

The addition of pembrolizumab to neoadjuvant chemotherapy followed by adjuvant pembrolizumab plus endocrine therapy improved pathologic complete responses in key subsets of patients with early-stage, high-risk, estrogen receptor–positive/HER2-negative breast cancer enrolled in the phase 3 KEYNOTE-756 trial.

Detection of circulating tumor DNA with the Signatera assay was associated with disease recurrence in patients with hormone receptor-positive, HER2-negative, node-positive, high-risk early breast cancer at 24 months post-randomization to treatment with adjuvant abemaciclib and endocrine therapy.

Capivasertib plus fulvestrant did not negatively affect quality of life compared with placebo plus fulvestrant in patients with aromatase inhibitor–resistant, hormone receptor–positive, HER2-negative advanced breast cancer.

Utilizing an artificial intelligence–assisted workflow to detect sentinel lymph node metastases in patients with breast cancer was deemed safe according to current diagnostic standards and reduced the need for immunohistochemistry and its associated financial burden.

The combination of ribociclib and endocrine therapy led to an improvement in progression-free survival and overall survival vs placebo plus endocrine therapy in patients with hormone receptor-positive/HER2-negative advanced breast cancer across all age groups.

The addition of carboplatin to taxane-anthracycline chemotherapy led to a significant improvement in event-free survival and overall survival as neoadjuvant therapy in patients with operable and locally advanced triple-negative breast cancer.