Toripalimab Maintenance for Locally Advanced Head and Neck Squamous Cell Carcinoma

Within 4 to 12 weeks after the first line of treatment, the maintenance treatment of Toripalimab was started, and 240 mg of Toripalimab was injected intravenously every 3 weeks (the maintenance treatment time was not more than 1 year, until there was an intolerable toxic reaction, or disease progression, or withdrawal of consent, or the investigator judged that it was necessary to withdraw from the treatment, or the subject had received treprizumab treatment for a cumulative period of 1 year or other reasons specified in the protocol). During the treatment period, tumor imaging evaluation shall be conducted every 3 months to see the research process description for details, and the evaluation shall be conducted according to the evaluation criteria of recist. If the evaluation is progress, the treatment shall be stopped.