AUTHOR=Tustumi Francisco , de Moura Diogo Turiani Hourneaux , Waisberg Jaques , Herbella Fernando Augusto Mardiros TITLE=Editorial: Premalignant conditions in the esophagus and stomach JOURNAL=Frontiers in Oncology VOLUME=12 YEAR=2022 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2022.1091911 DOI=10.3389/fonc.2022.1091911 ISSN=2234-943X