A prognostic model, including the EBV status of tumor cells, for primary gastric diffuse large B-cell lymphoma in the rituximab era.

ABSTRACT: EBV-positive diffuse large B-cell lymphoma (DLBCL), not otherwise specified (NOS), often affects the gastrointestinal tract. However, the prognostic significance of EBV associated with primary gastric DLBCL (gDLBCL) has not been established. This retrospective study included 240 patients with primary gDLBCL, diagnosed between 1995 and 2015. Tumor specimens were analyzed with EBER in situ hybridization. In 25 (10%) cases, tumor cells harbored EBV. The EBV+ group more frequently exhibited programmed death-ligand 1 (PD-L1) expression in microenvironment immune cells, but not tumor cells, compared to the EBV- group (86% vs 43%, P = .006). Among 156 patients that received rituximab-containing chemotherapy, the EBV+ group had a significantly worse overall survival (OS) than the EBV- group (P = .

SUBMITTER: Ishikawa E 

PROVIDER: S-EPMC6051208 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature