A Phase 2 Study of Anti-PD-L1 Antibody (Atezolizumab) in Alveolar Soft Part Sarcoma

This phase II trial studies how well atezolizumab works in treating patients with alveolar soft part sarcoma that has not been treated, has spread from where it started to other places in the body and cannot be removed by surgery. Monoclonal antibodies, such as atezolizumab, may allow the immune system cells to find and kill the tumor cells.