Hierarchical clustering of 46 DLBCL cases. A total of 46 cases (22 of CD5⁺, 7 of CD5^-CD10⁺, and 17 of CD5^-CD10^-) were clustered with the aid of Tree View software, based on the expression of 67 of 100 genes as described by Rosenwald et al.⁸  The degree of relative expression of the gene for each sample is indicated at the bottom. The samples were divided into 2 subgroups, ABC (left) and GCB (right).