Wednesday, November 16, 2022 HN9 trial, a Randomized Phase II Study Of Cisplatin Plus Radiotherapy Versus Durvalumab Plus Radiotherapy Followed By Adjuvant Durvalumab Versus Durvalumab Plus Radiotherapy Followed By Adjuvant Tremelimumab And Durvalumab In Intermediate Risk HPV-Positive Locoregionally Advanced Oropharyngeal Squamous Cell Cancer (LA-OSCC), was closed to accrual with 121 of the planned 180 patients randomized. This study is looking at whether a type of drug called durvalumab can be used with radiation during the initial treatment, (instead of cisplatin) and also afterwards as additional therapy. Durvalumab is an immunotherapy drug . It has been tested in many different types of cancers. Durvalumab works by allowing the immune system to detect the cancer and reactivate the immune response. For more information please visit the CCTG Member HN9 trial page.