T- and dendritic cell infiltrates in study DLBCLs. (A) Numbers of normal infiltrating CD2⁺ and CD3⁺ cells and GILT-positive dendritic cells in primary DLBCLs in each cluster. HR tumors included significantly higher numbers of CD2⁺ and CD3⁺ T cells than DLBCLs in the other clusters (P = .005 and P = .003, respectively; Kruskal-Wallis exact test). HR tumors also contained higher numbers of GILT⁺ dendritic cells (P = .06, Kruskal-Wallis exact test). (B) Hematoxylin and eosin staining and CD3 and GILT immunostaining of a representative HR tumor.