“…FDG-PET/CT is increasingly used as the first screening tool in some centers. In the single-center retrospective study of Opalinska and colleagues, 15 patients with suspected PNS were evaluated via FDG PET/CT, and a tumor was confirmed in 8 (53%) [9]. The frequency was lower than the 87% and 89% obtained in two meta-analyses [10,11].…”