A 71-year-old man on aspirin for stable ischemic heart disease presents with three episodes of large-volume painless hematochezia. After resuscitation and exclusion of upper GI source, urgent colonoscopy within 24 hours reveals extensive sigmoid diverticulosis. Most diverticula appear quiescent, but in one sigmoid diverticulum at 30 cm from the anal verge, the endoscopist identifies the structure marked **B** in the diagram—a visible, non-bleeding, pigmented protuberance at the dome of the diverticular sac. According to current ACG and ESGE guidelines for colonic diverticular bleeding, what is the most appropriate endoscopic management of this high-risk stigma?
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