Enrico Battistella1, Luca Pomba2, Antonio Toniato2. 1. Endocrine Surgery Unit, Veneto Institute of Oncology I.O.V.-I.R.C.S.S, Padova, Italy. enrico-battistella@libero.it. 2. Endocrine Surgery Unit, Veneto Institute of Oncology I.O.V.-I.R.C.S.S, Padova, Italy.