Giorgio Treglia1, Vittoria Espeli2, Luca Giovanella3. 1. Department of Nuclear Medicine and PET/CT Center, Oncology Institute of Southern Switzerland, Via Ospedale, 12, 6500, Bellinzona, Switzerland. giorgiomednuc@libero.it. 2. Division of Oncology, Oncology Institute of Southern Switzerland, Bellinzona, Switzerland. 3. Department of Nuclear Medicine and PET/CT Center, Oncology Institute of Southern Switzerland, Via Ospedale, 12, 6500, Bellinzona, Switzerland.