“…Endoscopic findings of peptic ulcer bleeding, including active or recent hemorrhage, are classified by using the Forrest classification [ 8 ], a well-known and useful tool for evaluating and predicting the risk of recurrent bleeding following endoscopic hemostasis [ 9 ]. Peptic ulcers with a Forrest classification from Ia (spurting arterial vessel) to IIb (adherent clot) are more likely to rebleed after initial hemostasis; endoscopic hemostasis during the first endoscopy is recommended to prevent rebleeding from these lesions [ 10 , 11 ], In addition, second-look endoscopy (SLE) is reported as useful in preventing rebleeding in patients with high-risk peptic ulcer bleeding [ 12 , 13 ], Therefore, to evaluate post-ESD bleeding and achieve hemostasis of high-risk lesions, SLE is commonly performed in many hospitals after ESD. However, the use of SLE after ESD is still controversial.…”