Advantages to Treating HR+ Patients With Breast Cancer With Abemaciclib

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.

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