Colorectal Endoscopic Submucosal Dissection: Past, Present, and Factors Impacting Future Dissemination.

First performed in the stomach for removal of localized gastric tumors, endoscopic submucosal dissection (ESD) has evolved into a technique that is increasingly being employed to resect colorectal lesions. As opposed to endoscopic mucosal resection (EMR), ESD allows the endoscopist to remove large specimens en bloc to provide accurate pathologic evaluation and lower local recurrence rates. ESD is an ideal technique for resection of lesions without lymph node metastases and is becoming the standard of care in Japan as outcomes data has proven it to be equally efficacious, less invasive, and inexpensive as compared with surgery; however, potential risk for complications is high and the procedure is currently not widely available in the Western world. As more interest, endoscopist training, and data supporting the technique's use mount, ESD will also likely become the standard of care in the Western world for resection of localized colorectal lesions.