SPP1 and diffuse large B-cell lymphoma: To support this hypothesis, we explored whether also human DLBCL cell lines do express the intracellular form of OPN by performing IF for OPN on cytospin preparation of SU-DHL-4, SUDH-L-10 (GC-DLBCL human cell lines), TMD8 and U2932 (ABC-DLBCL human cell lines).