A 58-year-old woman undergoes screening colonoscopy and is found to have a 7-mm sessile, salmon-pink polyp in the ascending colon. Narrow-band imaging shows a uniform tubular pit pattern consistent with low-grade adenoma. The endoscopist performs the technique marked **B** in the diagram: a thin dedicated cold snare is opened around the polyp with a 1-2 mm margin of normal mucosa, the snare is closed firmly with steady pressure (NO electrocautery), and the lesion is transected by mechanical guillotine action. The defect shows a clean white base with minimal oozing that stops spontaneously. Which of the following best describes the PRIMARY ADVANTAGE of the technique marked **B** over cold biopsy forceps for this 7-mm sessile polyp?
A. Faster procedure time and reduced need for sedation during the polypectomy
B. Superior histopathological specimen quality and easier assessment of margin status
C. Complete elimination of post-polypectomy bleeding risk due to mechanical transection without thermal injury
D. Significantly lower rates of incomplete resection (5-10% vs. 20-30%), reducing the risk of residual neoplastic tissue and interval cancer
Explanation
Why "Significantly lower rates of incomplete resection (5-10% vs. 20-30%), reducing the risk of residual neoplastic tissue and interval cancer" is right
The clinical anchor directly states that cold snare polypectomy achieves significantly LOWER RATES OF INCOMPLETE RESECTION compared to cold biopsy forceps (5-10% vs. 20-30%), and this difference is particularly important because residual neoplastic tissue is the dominant driver of interval cancer. For a 7-mm sessile adenoma, the U.S. Multi-Society Task Force and ESGE guidelines recommend cold snare as the preferred technique precisely because of this superior complete resection rate. The mechanical guillotine action with a 1-2 mm margin of normal mucosa ensures complete removal of the neoplastic lesion in the vast majority of cases.
Why each distractor is wrong
Faster procedure time and reduced need for sedation during the polypectomy: While cold snare may have faster procedure times compared to hot snare, this is not the PRIMARY ADVANTAGE over cold biopsy forceps. The anchor emphasizes complete resection as the dominant clinical benefit, not speed or sedation reduction.
Complete elimination of post-polypectomy bleeding risk due to mechanical transection without thermal injury: Although cold snare does have lower delayed bleeding rates than hot snare (because visible vessels are mechanically severed without coagulation), the anchor does not cite elimination of bleeding risk as the primary advantage over cold biopsy forceps. Cold biopsy forceps is not associated with significant bleeding risk either; the key difference is resection completeness.
Superior histopathological specimen quality and easier assessment of margin status: The anchor makes no claim about specimen quality or margin assessment differences between cold snare and cold biopsy forceps. Both techniques yield tissue for histopathology; the critical difference is the completeness of lesion removal, not specimen quality.
High-YieldNEET PG
Cold snare polypectomy is preferred for sessile/pedunculated polyps ≤10 mm because it achieves 5-10% incomplete resection rates versus 20-30% with cold biopsy forceps—a difference that directly impacts interval cancer risk.
U.S. MSTF Colonoscopy Surveillance Guidelines; ESGE Polypectomy Guidelines 2017
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