F Rosa1, P Renzetti2, L Castellan2, L Roccatagliata3,4. 1. Diagnostic Imaging Department, San Paolo Hospital- ASL 2, via Genova 30, Savona, Italy. francescarosa892@gmail.com. 2. Department of Neuroradiology, Ospedale Policlinico San Martino IRCCS, Genoa, Italy. 3. Department of Neuroradiology, Ospedale Policlinico San Martino IRCCS, Genoa, Italy. lroccatagliata@neurologia.unige.it. 4. Department of Health Sciences (DISSAL), Radiology Section, University of Genoa, Genoa, Italy. lroccatagliata@neurologia.unige.it.