Current evidence and issues of endoscopic submucosal dissection for gastric neoplasms during antithrombotic therapy

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CLINICAL REVIEW

Current evidence and issues of endoscopic submucosal dissection for gastric neoplasms during antithrombotic therapy Yoshiyasu Kono1   · Issei Hirata1 · Tetsuya Katayama1 · Hisahiro Uemura1 · Tetsu Hirata1 · Tatsuhiro Gotoda1 · Koji Miyahara1 · Yuki Moritou1 · Masahiro Nakagawa2 Received: 20 May 2020 / Accepted: 25 June 2020 © Japanese Society of Gastroenterology 2020

Abstract Endoscopic submucosal dissection (ESD) for gastric neoplasms is a useful treatment globally. However, postoperative bleeding after gastric ESD is a serious, and sometimes life-threatening complication in patients receiving antithrombotic drugs, because antithrombotic drugs are considered to increase the risk of postoperative bleeding after gastric ESD. In contrast, withdrawal of antithrombotic drugs during the perioperative period increases the risk of thrombotic complications. Guidelines for the management of antithrombotic drugs during the periendoscopic period have been published by different countries, and recent guidelines place greater emphasis on the risk of thromboembolism with the discontinuation of antithrombotic drugs than on the risk of bleeding with the continuation of antithrombotic drugs. Several studies have reported on the validity of these guidelines, and clinical evidence is being established. Most studies reported that gastric ESD under continuation of aspirin or cilostazol did not increase the risk of bleeding, whereas heparin replacement was strongly associated with a higher risk of bleeding. However, the data regarding some clinical issues about the management of antithrombotic drugs, such as the safety of gastric ESD under continuation of thienopyridine, administration of multiple antithrombotic drugs including dual antiplatelet and anticoagulants (warfarin and direct oral anticoagulant), and effective prophylactic methods for postoperative bleeding after gastric ESD are lacking. Larger clinical data are needed to resolve the remaining issues in the future. Keywords  Endoscopic submucosal dissection · Antithrombotic therapy · Delayed bleeding · Thromboembolism

Introduction Since the safety of endoscopic submucosal dissection (ESD) for gastric neoplasms has been well evaluated [1–3], the procedure is commonly performed worldwide. The indications of gastric ESD for early gastric cancer were based on the guidelines proposed by the Japanese Gastric Cancer

Association and included the expanded criteria proposed by Gotoda et al. [4, 5] as follows: (1) differentiated-type mucosal cancer or low-grade to high-grade dysplasia (adenoma), regardless of tumor size; (2) tumor size ≤ 3 cm if there was a differentiated-type mucosal cancer with ulcerative findings or minute submucosal invasion (