18F- fluorodeoxyglucose-positron emission tomography (FDG-PET) is a valuable prognostic tool in modern lymphoma care. In this study, we explored the utility of quantitative FDG-PET parameters in predicting the histology of suspected relapsed/refractory (R/R) lymphoma. We retrospectively analyzed 290 FDG-PET scans performed for suspected R/R lymphoma. FDG-PET parameters measured were maximum and mean Standardized Uptake Value (SUVMax, SUVMean), Total Metabolic Tumor Volume and Total …