Deborah Saraggi1, Giorgio Battaglia2, Maria Guido3. 1. Surgical Pathology & Cytopathology Unit, Department of Medicine-DIMED, University of Padova, Padova, Italy. 2. Veneto Institute of Oncology [IOV-IRCCS], Padova, Italy. 3. Surgical Pathology & Cytopathology Unit, Department of Medicine-DIMED, University of Padova, Padova, Italy. Electronic address: mguido@unipd.it.