A 70-year-old patient after radical prostatectomy referred with biochemical relapse due to a recurrence in the left seminal vesicle. Transaxial planes in both dynamic and static acquisitions illustrating the benefit of the dynamic phase in detecting the local recurrence. (a) Start of the dynamic phase showing simultaneous appearance of recurrence and arteries (see the radiopharmacon in the arteries). (b) Frame at the end of the dynamic phase. (c) Static imaging showing a focal increased uptake at the posterior wall of bladder, indistinguishable from bladder diverticulum or retained activity in the distal ureter, without considering the dynamic study.