Ozalp, HakanAktekin, MustafaHamzaoglu, VuralVayisoglu, YusufKaratas, Mehmet AliKarsiyaka, DilanUzmansel, DenizArpaci, Rabia BozdoganCayan, FilizEti, Can MehmetKanik, ArzuBaskan, Fuat CemAladag, Zeynep CansuErtas, ElifDagtekin, AhmetAvci, EmelBagdatoglu, CelalTalas, Derya Umit2023-02-212023-02-212019-01-0110.5152/iao.2019.5876https://hdl.handle.net/11443/1523http://dx.doi.org/10.5152/iao.2019.5876OBJECTIVES: Skull base is an important and a challenging area for surgeons. Success in skull base surgery depends on various factors such as pre-operative evaluation, appropriate surgical technique, anesthesia duration, intraoperative neuromonitorization and wound care. MATERIALS and METHODS: This study was performed in the Anatomy dissection laboratory of M.U. Medical Faculty (Ethical committee approval number 2010-103). Twelve fetuses between 17-33 gestational weeks fixed with formaldehyde were enrolled to the study. RESULTS:This study was planned to investigate the cross sectional areas of the sigmoid sinus in three levels to compare the right-left sides and the probable relationship among the levels in fetuses to further delineate the developmental factors on jugular foramen asymmetry. The cross-sectional measurements of sigmoid sinus lumen were done on 3 levels which are described as A1 levelsinodural angle, A2 levelthe midpoint between the sinodural angle and endocranial orifice and A3 level as the entrance (endo-cranial orifice) of the jugular foramen. There is a strong positive correlation between left (L) A1 and L A2 and also the same for L A1 and right (R) A2. These strong and positive correlations are all valid between L A2-L A3, L A2-R A2, L A2-R A3, L A3-R A3, R A1-R A2. CONCLUSION: Multicenter studies would be beneficial to investigate the topic with greater number of fetuses also on the different regions for genetic differences.Fetusjugular foramensigmoid sinusArticleWOS:000504768800015