AUTHOR=Yang Yuan-Hui , Yin Ke , Xu Jia-Qi , Xu Xiao-Ying , Zhang Jun-Lei , Liu Ji-Xuan , Feng Xin-Zhi , Lin Xiao-Yan TITLE=Proximal bronchiolar adenoma with malignant transformation to invasive mucinous adenocarcinoma with 4 years follow-up: a case report and literature review JOURNAL=Frontiers in Oncology VOLUME=15 YEAR=2025 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2025.1491339 DOI=10.3389/fonc.2025.1491339 ISSN=2234-943X