Endoscopic Submucosal Dissection (ESD)

This study is evaluating a minimally invasive procedure called Endoscopic Submucosal Dissection (ESD), which allows doctors to remove tumors from the lining of the digestive tract without open surgery. **You may be eligible if...** - You have been diagnosed with an early-stage tumor or pre-cancerous lesion in the stomach, esophagus, colon, or rectum - Your doctor has determined that ESD is an appropriate treatment for your condition - You are able to provide informed consent **You may NOT be eligible if...** - Your tumor is too large or deeply invasive for this procedure - You have a serious bleeding disorder or are on blood thinners that cannot be safely stopped - You are not a suitable candidate for endoscopic procedures due to other health conditions Talk to your doctor to see if this trial is right for you.