FIGURE 4.

Images from 76-y-old patient after radical prostatectomy (2006; Gleason score of 7b; pT3a; pN0) and with PSA level slowly rising to 0.78 ng/mL (October 2017). (A and B) Patient underwent primarily ⁶⁸Ga-PSMA-11 PET/CT, which resulted in suggestion of local recurrence (arrows). No definite diagnosis could be made on basis of adjacent high activity retention in urinary bladder. (C and D) Subsequent ¹⁸F-PSMA-1007 PET/CT 3 mo later clearly depicted PSMA ligand uptake in left seminal vesicle (arrows) with high contrast and very low retention in bladder.