This clinical trial is focused on studying treatments for patients with solid tumors, which are a type of cancer that forms in solid organs or tissues. The study is investigating the use of two medications: atezolizumab, also known by its code name RO5541267, and tiragolumab. These medications are given as a solution through a vein, a method known as intravenous infusion. The trial aims to understand how effective these treatments are in preventing the return of cancer after surgery in patients who have a higher risk of their cancer coming back. The study is particularly interested in patients whose tumors have certain characteristics, such as a high number of genetic changes, known as high tumor mutational burden (TMB-H), or a condition called microsatellite instability (MSI-H), which can affect how cancer grows and responds to treatment.
Participants in the study will receive either atezolizumab alone or a combination of atezolizumab and tiragolumab. The study will monitor patients over a period of time to see how well the treatments work in keeping the cancer from returning. This includes checking for any new tumors or other signs of cancer. The study will also look at how long patients live after receiving the treatment and any side effects they might experience. The goal is to gather information that could help improve treatment options for people with solid tumors in the future.
The trial will use a special test called FoundationOne®CDx to analyze the genetic makeup of the tumors. This test helps identify specific genetic changes that might make the cancer more likely to respond to the treatments being studied. By understanding these genetic factors, the study hopes to provide more personalized treatment options for patients with solid tumors. The trial is expected to continue for several years to gather comprehensive data on the effectiveness and safety of the treatments.



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