Case Report: Gastric submucosal neoplasm with CTNNB1 mutation showing GLI1 overexpression and epithelial differentiation - Ashizawa, Karin; Saito, Tsuyoshi; Yube, Yukinori; Mine, Shinji; Fukunaga, Tetsu; Antonescu, Cristina R.; Yao, Takashi (Frontiers in Medicine, 2025)