Colon Polypectomy – ESD: Fundamental Principles

This session closes the colon polypectomy series by moving from snare mucosectomy to the fundamental principles of endoscopic submucosal dissection (ESD). The teaching arc contrasts simple polypectomy with EMR/ESD as submucosal-plane resections aimed at en bloc, oncologically sound removal. Core setup points include lesion finding and border characterization with high-definition white light plus virtual or dye-based chromoendoscopy (including indigo carmine), building a reliable submucosal cushion, and keeping a clear field with water-jet/cap strategies during dissection. Snare choice still matters for hybrid work, but the lecture emphasizes standardized ESD steps over collecting more snare shapes. Expect practical language on marking, injection, and maintaining the plane rather than a brand-by-brand knife catalog.