Identification of a Patient Cohort with Relapsing Diffuse Large B-Cell Lymphoma with a Low International Prognostic Index in PET/CT Using a 2-Gene (LMO2/TNFRSF9) Scoring System

Abstract
Treating patients with diffuse large B-cell lymphoma (DLBCL) remains a challenge, with a remission rate of 75% at 2 years from diagnosis. The International Prognostic Index (IPI) [1] and molecular characterization [2] are employed in the stratification and relapse prediction. Additionally, 18F-fluorodeoxyglucose positron emission tomography (PET) and computed tomography (CT) have now become part of standard care in differentiating metabolic activity of the disease from fibrosis or necrosis [3]. Early optimism that the speed of response to treatment, as indicated by an interim-PET (iPET) scan after 2–3 cycles of chemotherapy, might reliably predict cure has not been fulfilled [4].