Background And Aims: The withdrawal of antithrombotic therapy from patients at high risk of thromboembolism is controversial. Previously, treatment with anticoagulants, such as warfarin and dabigatran, was recommended for heparin bridge therapy (HBT) during endoscopic submucosal dissection (ESD). However, HBT is associated with a high risk of bleeding during and after ESD. This study aimed to investigate the clinical outcomes of colorectal ESD in patients treated with warfarin and direct oral anticoagulants (DOAC).
Methods: This study included 412 patients with superficial colorectal neoplasms that were resected by ESD between June 2010 and June 2018. The patients were classified into two groups: without antithrombotics (n = 286) and with anticoagulants (n = 51). The anticoagulants group was further divided into two groups: warfarin (n = 26) and DOAC (n = 25).
Results: Among all patients, delayed bleeding occurred in 35 (8.5% [35/412]) patients. The bleeding rate in the anticoagulants group (11.8% [6/51]) was higher than that in the group without antithrombotics (6.6% [19/286]), but the difference was not statistically significant (P = 0.240). The bleeding rate in the DOAC group (16.0% [4/25]) was higher than that in the warfarin group (7.7% [2/26]), but the difference was not statistically significant (P = 0.419). All delayed bleeding was successfully managed with endoscopic hemostasis. Thromboembolic events were not observed in any patients.
Conclusions: The bleeding rate with anticoagulants was relatively high. However, all bleeding events with anticoagulants were minor and clinically controllable. Colorectal ESD with DOAC and warfarin may be feasible and acceptable.
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