BCL2 and diffuse large B-cell lymphoma: Our results indicate that like gene rearrangement, extra copies of MYC and/or BCL2 could also lead to the upregulation of protein expression, while the frequency of protein expression in patients with DLBCL with extra copies of MYC and/or BCL2 was lower than that in patients with DLBCL with gene rearrangement, which was similar to the results of previous studies [13, 21].