EMR (Endoscopic Mucosal Resection)
EMR is an endoscopic technique developed for the removal of sessile or ﬂat neoplasms confirmed to the superficial layers (mucosa and submucosa) of the GI tract. EMR is typically used for removal of lesions smaller than 2 cm or piecemeal removal of larger lesions, EMR can be considered a variation of standard polypectomy with specialized devices.
ESD (Endoscopic Submucosal Dissection)
ESD has been developed for en bloc removal of large (usually more than 2 cm), ﬂat GI tract lesions and is usually done in several steps ESD typically is performed by endoscopists with experience in advanced procedures and familiarity with mucosal dissection techniques