Its finding in 109 de novo cases was supposed to represent a unique subgroup of DLBCL because of the uniform phenotype (CD5+/CD10−/CD19+/CD20+/CD21+/CD23−/cyclin D1−), usual centroblastic morphology and aggressive clinical behavior (Yamaguchi et al. 2002; Suguro et al. 2006). Here, MME is linked to diffuse large B-cell lymphoma.