Treatment of a sessile serrated adenoma/polyp deeply invading the appendiceal orifice enabled by combined adaptive traction and underwater endoscopic submucosal dissection - De Cristofaro, Elena; Masgnaux, Louis-Jean; Lupu, Alexandru; Wallenhorst, Timothée; Jacques, Jérémie; Rivory, Jérôme; Pioche, Mathieu (Endoscopy, 2024)