Survival was evaluated in 3 different restaging classification systems, based on focusing only on primary lesion (TRG), loco-regional evaluation (ypTNM) and whole-body 18F-FDG PET/CT evaluation (VRA).
FDG PET/CT scan was performed to detect the primary lesion, which showed that in addition to multiple hypermetabolic pulmonary nodules, a mass in the right maxillofacial region with high FDG uptake was also found.
The following <sup>18</sup>F-FDG PET/CT-derived parameters were computed: maximum diameter of the primary lesion (T), of the largest lymph node (N), and of the largest metastatic lesion (M); SUV<sub>max</sub>; SUV<sub>mean</sub>; size-incorporated SUV<sub>max</sub>; metabolic tumor volume; and total lesion glycolysis.
The <sup>18</sup>F-FDG PET/CT scan showed better both the primary lesion and the metastases in the pelvic lymph nodes than the <sup>68</sup>Ga-dotanoc scan supporting diagnosis and treatment planning.