Diagnosis and outcome of DLBCL subtypes by GEP. (A) Heat map showing differential expression of genes in GCB, ABC, and PMBL DLBCL subtypes. (B) Kaplan-Meier estimates of progression-free and overall survival are shown according to GCB or ABC DLBCL subtype in patients treated with R-CHOP–based therapy. Median follow-up is approximately 2 years.