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Mucosal healing (left) and active disease (right) in a patient with UC. In the left image (Geboes score 1.1), there is mild but unequivocally increased chronic inflammatory infiltration without epitheliotropism and without neutrophils. Also, there is a slightly modified plasma cell gradient. In the right image (Geboes score 4.2), note marked inflammatory infiltration with numerous neutrophils, epitheliotropism and crypt destruction. Hematoxylin-eosin, 100×.
