Introduction: For Functional Endoscopic Sinus Surgery (FESS). the surgeon needs an accurate depiction of the anatomy of paranasal sinuses and their variations. Computed tomography (CT Scan) fulfills this requirement by providing detailed anatomy. the anatomical variants. https://iriaayra6xkht.blog2freedom.com/34914234/gjb2-mutation-spectrum-in-2063-chinese-patients-with-nonsyndromic-hearing-impairment