A Study Evaluating the Efficacy and Safety of Adjuvant Atezolizumab or Placebo and Trastuzumab Emtansine for Participants With HER2-Positive Breast Cancer at High Risk of Recurrence Following Preoperative Therapy

This is a Phase III, two-arm, randomized, double-blind placebo-controlled study in
participants with HER2-positive primary breast cancer who have received preoperative
chemotherapy and HER2-directed therapy, including trastuzumab followed by surgery, with a
finding of residual invasive disease in the breast and/or axillary lymph nodes.

As of June 4, 2024, this study is no longer accepting any newly screened participants.

Treatment Sites in Georgia