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Figure 6


Fig. 3 —False-negative FDG PET study in 38-year-old man with neurofibromatosis type 1 who presented with enlarging abdominal mass. Axial FDG PET image shows large area of photopenia with surrounding mildly increased FDG uptake (standardized uptake value = 1.8) (arrows). At surgery, poorly differentiated carcinoma was found.