Clustering of DLBCL into GCBL, ABL, and type 3 DLBCL. The 46 DLBCLs were hierarchically clustered using the average linkage method for 99 probe pair sets that represented 62 genes of the 100 reported to distinguish GCBL/ABL DLBCL at the significance level of P < .001.²²  Of the 62 genes, 23 (31 probe pair sets, yellow) were represented within the GCBL DLBCL expression signature and 39 (68 probe pair sets, blue) within the ABL DLBCL expression signature. Select transcripts are listed, with a full list given in Additional Data B. Red indicates high expression and green, low expression, with the color scale at the bottom showing the relative expression in standard deviations from the mean. *Specimens with t(14;18)(q32;q21) translocation.