A 58-year-old man on aspirin for secondary prevention of coronary artery disease undergoes screening colonoscopy. A 7 mm sessile polyp is identified in the sigmoid colon with Paris IIa morphology. The endoscopist chooses the technique marked **C** in the diagram for resection. Which of the following is the PRIMARY advantage of this approach over hot snare polypectomy in this clinical context?
A. Substantially lower risk of delayed post-polypectomy hemorrhage due to absence of thermal injury to submucosal vessels
B. Reduced need for histopathologic examination of the resected specimen
C. Faster procedure time because submucosal injection is not required
D. Superior en-bloc resection rates compared to hot snare for lesions >10 mm
Explanation
Why "Substantially lower risk of delayed post-polypectomy hemorrhage due to absence of thermal injury to submucosal vessels" is right
Cold snare polypectomy (CSP), marked as C, is the preferred technique for small (≤10 mm) sessile polyps per USMSTF 2020 and ESGE 2017 guidelines. The critical advantage in this anticoagulated patient is the substantially lower delayed bleeding risk—CSP causes mechanical cutting only without electrocautery, so there is no thermal injury to submucosal vessels. Hot snare techniques create thermal injury that can erode vessel walls days later, causing post-polypectomy hemorrhage (1–6% incidence). CSP reduces this to <1%. This is especially important for patients on antithrombotics like aspirin, who can safely continue their medication during CSP. The anchor fact is that the shift from hot to cold techniques is based on superior safety profile while maintaining comparable efficacy.
Why each distractor is wrong
Faster procedure time because submucosal injection is not required: While CSP does not require submucosal injection for lesions ≤10 mm, procedure time is not the primary advantage—safety is. Hot snare also does not require injection for small lesions, and the time difference is minimal. This is a secondary benefit, not the PRIMARY clinical advantage.
Superior en-bloc resection rates compared to hot snare for lesions >10 mm: CSP is NOT indicated for lesions >10 mm; EMR or hot snare is used for larger polyps. CSP has equivalent (not superior) en-bloc resection rates for lesions ≤10 mm. This option contradicts the scope of CSP indications.
Reduced need for histopathologic examination of the resected specimen: Both CSP and hot snare require histopathologic examination of the resected specimen for assessment of dysplasia grade and completeness of resection. CSP does not reduce this need.
High-YieldNEET PG
Cold snare polypectomy for polyps ≤10 mm is the preferred first-line technique because it offers substantially lower delayed bleeding risk without compromising efficacy—and anticoagulated patients can safely continue their medications.
