Prognostic significance of the standardized uptake value of pre-therapeutic (18)F-FDG PET in patients with malignant lymphoma.

Metabolic imaging with F-18-fluorodeoxyglucose (18F-FDG) positron-emission tomography (PET) is widely used for staging and treatment evaluation of malignant lymphoma. To date, only a few studies have indicated that lower glucose metabolism measured by 18F-FDG PET before or early in the course of treatment of malignant lymphoma is associated with a favorable outcome. The aim of this study was to assess the prognostic capability of the 18F-FDG PET maximum standardized uptake value (SUVmax), a semiquantitative measurement of glucose metabolism, at the time of diagnosis of malignant lymphoma. We retrospectively analyzed data from 69 patients (median age: 61 and range 23–80) with malignant lymphoma (22 patients with Hodgkin’s disease [HD] and 47 patients with Non-Hodgkin’s lymphoma [NHL]) who had not received treatment before 18F-FDG PET imaging. Metabolic remission according to PET results was observed after chemotherapy in 50 patients (72.5%), while progressive disease or relapse was diagnosed in 19 patients (27.5%). Clinical follow-up revealed relapse in 4/50 patients with prior metabolic remission. A significantly lower (P 12.9 showed disease progression at follow-up. Semiquantitative measurement of glucose metabolism (SUVmax) by 18F-FDG PET at diagnosis is a predictor of outcome of patients with malignant lymphoma.