Fig. 4
A 20-year-old female patient, recently diagnosed case of HL. Initial PET/CT study revealed hypermetabolic mediastinal mass in whole body PET MIP image (a), formed of enlarged amalgamated retrosternal/prevascular mediastinal in axial CECT image (b) and achieving 5.5 SULpeak in corresponding fused PET/CT image (c). Follow-up PET/CT study still showed the hypermetabolic mediastinal mass in whole body PET MIP image (f) that was of stationary size in axial CECT image (d) denoting SD according to RECIST 1.1, and almost showing stationary FDG uptake (6 SULpeak) in fused PET/CT image (e) denoting SMR according to PERCIST 1.0