The Deauville 5-point scoring system is an internationally accepted and utilized five-point scoring system for the Fluorodeoxyglucose (FDG) avidity of a Hodgkin’s lymphoma or Non-Hodgkin’s lymphoma tumor mass as seen on FDG Positron emission tomography
Score 1: No uptake above the background.
Score 2: Uptake ≤ mediastinum.
Score 3: Uptake > mediastinum but ≤ liver.
Score 4: Uptake moderately increased compared to the liver at any site
Score 5: Uptake markedly increased compared to the liver at any site
Score X: New areas of uptake unlikely to be related to lymphoma
Scores of 1 and 2 are considered to be negative and 4 and 5 are considered to be positive.
Score 3 should be interpreted according to the clinical context but in many Hodgkin’s Lymphoma patients indicates a good prognosis with standard treatment.