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A: H&E staining (10*40), medium or large cells, round or oval, with nucleoli and mitotic images, residual follicular epithelium, diffuse patellar distribution. B: CD20 positive (10*40). C: Bcl-6 positive (10*40). D: Mum-1 positive (10*40). E: CD10 negative (10*40). F: Ki-67 is about 90%+ (10*40).
