Metronomic Capecitabine Plus Aromatase Inhibitor as Initial Therapy in Patients With Hormone Receptor-Positive, Human Epidermal Growth Factor Receptor 2-Negative Metastatic Breast Cancer-The Phase III MECCA Trial.

Purpose: The effects of metronomic chemotherapy plus endocrine therapy have yet to be elucidated through a randomized phase III clinical trial.

Methods: Randomized clinical trials were conducted at 12 centers in China from August 22, 2017, to September 24, 2021, and the final follow-up date was August 25, 2023. Patients with hormone receptor-positive, human epidermal growth factor receptor 2 (HER2)-negative metastatic breast cancer (MBC) who had no previous systemic therapy in the metastatic setting were enrolled.

High PD-L1 expression was associated with poor prognosis in 870 Chinese patients with breast cancer.

Background: To investigate the role of PD-L1 expression in tumor recurrence and metastasis in Chinese patients with breast cancer.

Methods: Suitable tissue samples were available from 870 patients with breast cancer. Paraffin-embedded tumor sections were stained with PD-L1 antibody.