The Australia and New Zealand Multicentre Upper Gastrointestinal Endoscopic Tissue Resection Study

This multicenter Australian and New Zealand study is collecting data on outcomes of advanced endoscopic procedures — including endoscopic submucosal dissection (ESD), full-thickness resection (EFTR), and submucosal tunneling resection (STER) — used to remove tumors or abnormal growths in the upper digestive tract (esophagus, stomach, and duodenum). **You may be eligible if:** - You are 18 or older - You have a growth or lesion in the upper digestive tract (esophagus, stomach, or duodenum) larger than 10mm - The lesion is confined to the inner layers of the gut wall (suitable for one of the listed endoscopic procedures) **You may NOT be eligible if:** - You are under 18 - You are unable to give informed consent - You are pregnant or breastfeeding - You have a bleeding disorder or cannot safely stop blood-thinning medications before the procedure Talk to your doctor to see if this trial is right for you.