This research is about a new treatment for a type of throat cancer caused by the human papillomavirus (HPV). The cancer can be removed by surgery. The treatment being tested is called atezolizumab, which is a type of medicine that helps the body's immune system attack cancer cells. Immune system means the part of the body that fights off germs and diseases. The study's main goal is to find out if atezolizumab is safe and how well it works in these patients.

• The study lasts for about 2 years, with regular check-ups and scans.
• Participants will receive atezolizumab through an IV (a tube into a vein).
• There may be some risks, like changes in the immune system, but this treatment could help stop cancer from growing.

To join, you need to be 18 or older, not pregnant, and have a specific type of throat cancer that has not spread too much. You also should not have certain other health issues like severe infections or heart problems. If interested, you would need to agree to follow all study guidelines and use birth control if you can have children.