What is endoscopic mucosal resection (EMR)?

Endoscopic mucosal resection (EMR) is a minimally invasive procedure invented for safe remove of large polyps from the gastrointestinal tract. In the past such larger lesions/polyps used to be removed with surgery but now most can be removed with endoscopy. This  preserves tissue, avoids a surgery and need for hospital stay, and most importantly no scar.