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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.
