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Bcl6 and AID expression in organized lymphoid aggregates. (A) A central zone of Bcl6 expression (black) in a second large lymphoid aggregate from the persistent tongue LM pictured in Figures 3D–3F. CD3 positive T-cells are brown. (B) Cells in the germinal center of this lymphoid aggregate also express activation-induced cytidine deaminase (brown cells). Scale bar = 100 microns. This figure is available in color in the online version of this article at www.liebertpub.com/lrb
