Demet Sengul1, Ilker Sengul2,3, Anton Pelikán4,5. 1. Faculty of Medicine, Department of Pathology, Giresun University, Giresun, Turkey. 2. Faculty of Medicine, Division of Endocrine Surgery, Giresun University, Giresun, Turkey. 3. Faculty of Medicine, Department of General Surgery, Giresun University, Giresun, Turkey. 4. Faculty of Humanities, Department of Health Care Sciences, Univerzita Tomáše Bati ve Zlíně, Zlín, Czech Republic. 5. Faculty of Medicine, Department of General Surgery, Ostravska Univerzita V Ostrave, Ostrava, Czech Republic.