FOXC1 and diffuse large B-cell lymphoma: We investigate the additive prognostic value of stromal FOXC1 expression and tumor phosphorylated ERK1‐2 (pERK1‐2) expression to the established National Comprehensive Cancer Network International Prognostic Index (NCCN‐IPI), in 92 diffuse large B‐cell lymphoma (DLBCL) cases.