Endoscopic Mucosal Resection vs Endoscopic Submucosal Dissection For Barrett's Esophagus and Colorectal Neoplasia.

Endoscopic resection has become the first-line therapy for the management of superficial neoplasia throughout the gastrointestinal tract. Endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD) are established yet distinct techniques for the treatment of superficial gastrointestinal neoplasia. EMR is simpler and faster but is limited by its ability to resect large lesions en bloc. Limitations of piecemeal EMR of large lesions include a high rate of recurrence and a less-than-ideal tissue specimen for accurate histologic evaluation. ESD, on the other hand, allows en bloc resection regardless of lesion size, reducing risk for recurrence and facilitating precise histologic staging. However, ESD can take longer than EMR, is technically more complex, and traditionally has been associated with a higher rate of adverse events. Ultimately, the optimal endoscopic technique should be selected based on organ location, type of neoplastic lesion, and local expertise. The role of ESD has expanded in Eastern regions, beyond squamous cell lesions in the esophagus and gastric cancer to include superficial Barrett's esophagus (BE) and colon neoplasia. However, there is controversy in Western regions over use of ESD for BE and colon neoplasia. We discuss the clinical outcomes of EMR and ESD for the treatment of superficial BE and colon neoplasia, focusing on practical considerations for formulating the most appropriate endoscopic resection approach for each patient.