IGHM and diffuse large B-cell lymphoma: Actually, significant differences in abundance were only observed for periostin (POSTN; ß = +1.55; p = 0.00076) and lumican (LUM; ß = +1.49; p = 0.00058), both of which were upregulated in GCB-like DLBCL, and the immunoglobulin heavy constant mu (IGHM; ß = −2.56; p = 0.002) and the tyrosine-protein phosphatase non-receptor type 1 (PTN1; ß = −3.48; p = 0.00001), both of which were downregulated in GCB-like DLBCL.