Molecular Cytogenetic Characterization of a Three-way t(8;14;22)(q24;q32;q11.2) with Involvement of MYC/IGH/IGL in a Case of a Diffuse Large B-cell Lymphoma (DLBCL).

Abstract

Objectives: Diffuse large B-cell lymphoma (DLBCL) is a non-Hodgkin's lymphoma (NHL) that is the most common and the most aggressive or fast-growing form of NHL. It can lead to death if left untreated. Cytogenetic abnormalities include rearrangements of the IgH and BCL2 genes. Herein we described a t(8;14;22)(q24;q32;q11.2) within the context of a complex karyotype involving MYC/IGH/IGL in a three-way translocation that was characterized by molecular cytogenetics. The t(8;14)(q24;q32) is a recurrent chromosome abnormality described in non-Hodgkin lymphomas (NHL), especially in 80% of Burkitt lymphoma (BL) and diffuse large B-cell lymphomas. The variant t(8;22) (q24;q11) is also seen in these cases. MYC rearrangements have been observed in up to 10% of cases of diffuse large B-cell lymphomas (DLBCL) and is usually associated with a complex pattern of genetic alterations. This particular pattern with IGH-MYC rearrangements within the context of complex karyotypes is seen in diffuse large B-cell lymphomas. Complex karyotypes are associated with genomic instability and a poor prognosis.