ABCRS

Practice session

A patient with severe ulcerative colitis on maximal medical therapy (infliximab, steroids, tacrolimus) has failed to achieve remission. Total proctocolectomy with ileal pouch-anal anastomosis (IPAA) is planned. Which of the following is the CLASSIC histopathologic feature of ulcerative colitis (UC) that differentiates it from Crohn's disease?

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