Zoran Jukić1, Jasna Bacalja2, Jozo Kristek3, Miroslav Bekavac-Bešlin4, Božo Krušlin5,6. 1. Department of Surgery, General Hospital Nova Gradiška, Nova Gradiška, Croatia. 2. Clinical Department of Pathology and Cytology, University Hospital Dubrava, Zagreb, Croatia. jasnabacalja@yahoo.com. 3. Department of Surgery, Clinical Hospital Center Osijek, Osijek, Croatia. 4. Department of Surgery, Sestre Milosrdnice Clinical Hospital Center, Zagreb, Croatia. 5. School of Medicine, University of Zagreb, Zagreb, Croatia. 6. Ljudevit Jurak Department of Pathology, Sestre Milosrdnice Clinical Hospital Center, Zagreb, Croatia.