Salvatore Gruttadauria1,2, Duilio Pagano1, Settimo Caruso3, Davide Cintorino1. 1. Department for the Treatment and Study of Abdominal Diseases and Abdominal Transplantation, Istituto di Ricovero e Cura a Carattere Scientifico-Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione, University of Pittsburgh Medical Center Italy, Palermo, Italy. 2. Department of Surgery and Surgical and Medical Specialties, University of Catania, Catania, Italy. 3. Radiology Unit, Department of Diagnostic and Therapeutic Services, Istituto di Ricovero e Cura a Carattere Scientifico-Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione, University of Pittsburgh Medical Center Italy, Palermo, Italy.