Manuela Vadrucci1,2, Giovanni Serio3, Alberto Baroli2. 1. Department of Health Sciences, University of Milan, Milan, Italy. manuela.vadrucci@unimi.it. 2. Department of Oncology, Nuclear Medicine Unit, Busto Arsizio, Italy. 3. Department of Pathology, Busto Arsizio Hospital, Busto Arsizio, Italy.