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Fig. 3E. —Two opposing examples of benign nodal disease appearance on PET/CT. Same patient as described in Figures 2A, 2B, 2C, 2D, and 2E has malignant peripheral nerve sheath tumor. Axial CT (D), PET (E), and fused PET/CT (F) images show enlarged FDG-avid left external iliac node (arrows) that was not metastatic but contained follicular hyperplasia and sinus histiocytosis seen on pathologic review.