U.S., June 19 -- ClinicalTrials.gov registry received information related to the study (NCT07657130) titled 'Optimal Application Timing of ADC Drugs for Advanced Breast Cancer' on July 31, 2025.

Brief Summary: This study plans to initiate a prospective, randomized controlled trial to investigate the optimal timing of antibody drug conjugate (ADC) therapy in the management of advanced Human Epidermal Growth Factor Receptor 2 (HER2)-negative breast cancer.

Primary Objective:

To compare the difference in PFS2 (Time from randomization to disease progression after second therapy) between antibody-drug conjugate (ADC) followed by chemotherapy versus chemotherapy followed by ADC in the treatment of advanced HER2-negative breast cancer.

Seconda...