AUTHOR=Ruan Liqin , Wu Xiaoyong , Peng Guiping , Zhang Jing , Chen Weili TITLE=Application of contrast-enhanced ultrasonography for gallbladder squamous cell carcinoma: a case report JOURNAL=Frontiers in Oncology VOLUME=14 YEAR=2024 URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2024.1502226 DOI=10.3389/fonc.2024.1502226 ISSN=2234-943X