A clinical trial to look at how well tiragolumab plus atezolizumab and chemotherapy worked to treat triple-negative breast cancer (TNBC) that was in its early stages or had already spread to other parts of the body

A Study of the Safety, Efficacy, and Pharmacokinetics of Tiragolumab in Combination With Atezolizumab and Chemotherapy in Participants With Triple-Negative Breast Cancer