{"knowledge_schema": {"broad_category": "Medicine \u2192 Gastroenterology \u2192 Complications of Colonoscopy", "refinement": "This problem focuses on the complications that can arise after a colonoscopy, particularly following polypectomy procedures.", "specific_scope": "The case involves a patient who experienced symptoms and imaging findings after a technically challenging colonoscopy with polypectomy, leading to a specific diagnosis.", "goal": "Identify the most likely diagnosis based on the clinical presentation and imaging findings following a colonoscopy."}, "summary": "In this clinical scenario, a 65-year-old woman develops symptoms after a challenging colonoscopy with polypectomy. The imaging shows colonic wall thickening and pericolic fat stranding without free air, which suggests inflammation rather than perforation or bleeding. The most likely diagnosis is postpolypectomy syndrome, characterized by localized inflammation at the site of polypectomy, leading to abdominal discomfort and other symptoms."}