en تخصصي Special گزارش مورد case report <p>Since identical twins occur as a result of the division of one egg, they have the same genetic structure. Therefore, their phenotypes and sex are also always the same. However, due to the effect of environmental factors, some of the characteristics of twins living in different regions appear to develop differently. In our case of 17-year-old maternal twins, we emphasized that nasal pathologies carried a genetic background in terms of their similarity in septum deviation and external nasal deformity, which were determined to have occurred without a history of trauma.<br> <br> The article has also been presented at 10^th Turkish Rhinology Congress, 22-25 May, 2014 Antalya, Turkey.<br> &nbsp;</p> <p></p> Nasal deformıty, Monozıgotıc twıns, Paranasal, Computed tomography analysıs 253 255 http://wjps.ir/browse.php?a_code=A-10-230-2&slc_lang=en&sid=1 Fatih Ozdogan ozdogan.fatih@gmail.com 10031947532846006046 10031947532846006046 Yes ENT Clinic, Derince Education and Research Hospital, Kocaeli, Turkey Halil erdem Ozel 10031947532846006047 10031947532846006047 No ENT Clinic, Derince Education and Research Hospital, Kocaeli, Turkey Erkan Esen 10031947532846006048 10031947532846006048 No ENT Clinic, Derince Education and Research Hospital, Kocaeli, Turkey Serdar Baser 10031947532846006049 10031947532846006049 No ENT Clinic, Derince Education and Research Hospital, Kocaeli, Turkey Selahattin Genc 10031947532846006050 10031947532846006050 No ENT Clinic, Derince Education and Research Hospital, Kocaeli, Turkey Adin Selcuk 10031947532846006051 10031947532846006051 No ENT Clinic, Derince Education and Research Hospital, Kocaeli, Turkey