Molecular Characterization and Outcomes of Aggressive B-Cell Lymphomas.

Single-center, Retrospective Study Aimed to Perform a Molecular Characterization of Aggressive B-cell Lymphomas (Diffuse Large B-cell Lymphoma, High-grade B-cell Lymphoma With MYC and BCL2 and/or BCL6 Translocations, High-grade B-cell Lymphoma Not Otherwise Specified) and to Observe the Clinical Patients' Outcomes According to the 2017 WHO Classification

This is a retrospective analysis of the presence of chromosomal rearrangements involving MYC, BCL2 and BCL6 genes by FISH in a retrospective, single-center series of large B-cell lymphomas, in order to allow a better classifications of these cases according to the current WHO 2017 classification. If this evaluation will be confirmed as a reliable method to reclassify in different groups the evaluated tumors, it can be subsequently routinely apply to indicate the best treatment approaches in this high-risk setting of patients with a significant impact on patients' morbidity and mortality, and also on the health system and related costs.

• Histologically-confirmed diagnosis of LBCL (i.e., DLBCL, HGBCL, unclassifiable B-cell lymphoma with features intermediate between DLBCL and BL), or aggressive B-cell lymphomas with blastoid morphology (excluding blastoid variant of mantle cell lymphoma and lymphoblastic lymphoma)
• Histopathological diagnosis performed between 2000 and 2019.
• HIV sero-negativity
• Age ≥18
• Treatment with R-CHOP or other intensified polychemotherapy regimen
• Availability of adequate histopathological samples at diagnosis for FISH analysis
• Availability of clinical records and outcomes data

Exclusion criteria

• Histologic diagnosis other than DLBCL or unclassifiable B-cell lymphoma with features intermediate between DLBCL and BL