AUTHOR=Liu Jiang , Zhang Xiumei , Ren Qun , Song Chuanjun , Yu Jianhe , Cai Yin , Chen Dadong TITLE=Negative response to immunotherapy in dMMR or MSI-H gastric cancer with APC and PTEN mutations: a case report JOURNAL=Frontiers in Oncology VOLUME=14 YEAR=2024 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2024.1484802 DOI=10.3389/fonc.2024.1484802 ISSN=2234-943X