CT (a, c, and e) and FDG-PET (b, d, and f: fusion images; g: coronal MIP image) of whole body in 58-year-old man (case 5). CT shows soft tissue density around the left C6 (a; arrow), right L5 (c; arrows), and S1 nerves (e; arrow). High FDG uptakes are identified as perineural masses (b, d, f, and g; arrows).
