Case Report: Endoscopic anal papillectomy combined with ligation: a new approach for the treatment of grade IV hemorrhoids (with video). - Lv, Xiaopan; Zhu, Mingli; Zeng, Xianzhong; Li, Zheng; Jiang, Kaitong; Yuan, Xuemin (Frontiers in Gastroenterology (Frontiers Media S.A.), 2026)