AUTHOR=Lu Xiameng , Tan Bibo , Yang Liuting , Huang Suning TITLE=Complete remission after sintilimab combined with chemoradiotherapy in double primary head and neck carcinoma: case report JOURNAL=Frontiers in Oncology VOLUME=14 YEAR=2024 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2024.1397877 DOI=10.3389/fonc.2024.1397877 ISSN=2234-943X