Multi-center Evaluation of the Clinical Utility of ESD in the Western Population

This multi-centre study evaluates how endoscopic submucosal dissection (ESD) — a minimally invasive procedure to remove early-stage gastrointestinal tumours from the lining of the gut — is performed and what outcomes it achieves in Western healthcare settings. This helps determine whether ESD is as effective in Western populations as it is in Asian populations where it was first developed. You may be eligible if: - You are 18 years of age or older - You are already scheduled to undergo ESD as part of your standard medical care You may NOT be eligible if: - You have a contraindication to endoscopy - You are participating in another research study that could affect the results - You are unable or unwilling to provide informed consent Talk to your doctor to see if this trial is right for you.