Table 2.

Studies demonstrating poor prognostic impact of MYC and BCL2 expression in DLBCL at diagnosis

ReferenceNumber of patientsTherapyCOO assignment% MYC/BCL2 thresholds% DE-DLBCL% DE-DLBCL% HGBL-DH% HGBL-DH that are GCB
ABCGCB
11 193 R-CHOP Hans 40/70 29 18 11 91 
10 307 R-CHOP GEP/Choi 40/50 21 16 64 
12 466 R-CHOP GEP 40/70 34 22 12 2.3 90 
13 336 R-CHOP Hans 40/70 28 23 NA 
14 506 R-CHOP Hans 40/>0 35 NA NA NA 
15 311 R-CHOP Choi 50/30 44 16 28 NA NA 
898 R-CHOP GEP/Choi 70/70 18 21 14 95 
68 40 Dose-intensified R-CHOP + ASCT Hans 40/50 25 18  
ReferenceNumber of patientsTherapyCOO assignment% MYC/BCL2 thresholds% DE-DLBCL% DE-DLBCL% HGBL-DH% HGBL-DH that are GCB
ABCGCB
11 193 R-CHOP Hans 40/70 29 18 11 91 
10 307 R-CHOP GEP/Choi 40/50 21 16 64 
12 466 R-CHOP GEP 40/70 34 22 12 2.3 90 
13 336 R-CHOP Hans 40/70 28 23 NA 
14 506 R-CHOP Hans 40/>0 35 NA NA NA 
15 311 R-CHOP Choi 50/30 44 16 28 NA NA 
898 R-CHOP GEP/Choi 70/70 18 21 14 95 
68 40 Dose-intensified R-CHOP + ASCT Hans 40/50 25 18  

This table summarizes the key studies that have identified the coexpression of MYC and BCL2 as a poor prognostic factor in patients with DLBCL. Cell of origin (COO) assignment was performed by gene expression profiling (GEP) or by using immunohistochemistry algorithms, the most common being Hans.113-115  The average proportion of DE-DLBCL in all DLBCL is ∼30%, with two-thirds of patients being the ABC subtype and one-third being the GCB subtype. HGBL-DH occurs in ∼5% of DLBCLs, and >90% of patients are assigned as GCB in all but 1 study.

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