Egesta Lopci1, Arnoldo Piccardo2, Massimo Lazzeri3. 1. Nuclear Medicine Unit, Humanitas Clinical and Research Hospital - IRCCS, Rozzano, Italy. 2. Department of Nuclear Medicine, Galliera Hospital, Genoa, Italy. 3. Department of Urology, Humanitas Clinical and Research Hospital - IRCCS, Rozzano, Italy.