Study of Disitamab Vedotin to Treat Adults With Advanced HER2-Positive or HER2-Low Breast Cancer

What this Trial Is About

Researchers are evaluating the safety and effects of disitamab vedotin for treating adults with advanced breast cancer that is difficult to treat and has spread in the body. The study focuses on patients whose tumors express HER2 and who have previously received treatment for their advanced breast cancer. This open-label, non-randomized study is sponsored by Pfizer and includes multiple groups based on HER2 and hormone receptor status. All participants will receive disitamab vedotin as an intravenous infusion every two weeks at the study clinic. The treatment continues until either the participant or doctor decides to stop, which may be due to cancer progression, side effects, or personal choice. After stopping treatment, participants will have follow-up visits about every six weeks, followed by phone calls every twelve weeks to monitor their health. During the study, participants will attend visits every two weeks for treatment and assessments. Researchers will evaluate tumor response, duration of response, disease control, progression-free survival, overall survival, and drug levels in the blood. Safety will be monitored for up to two years, and participants can expect regular checkups and tests throughout the study period, which may last up to three years.

A Study of Disitamab Vedotin in Adults With HER2 Expressing Advanced Breast Cancer