ABSTRACT Sphenoid sinus is surrounded by critical structures and this can make sphenoid sinus surgeries very dangerous. The aims of this research were to study the anatomical relationships between the sphenoid sinus and their important adjacent neurovascular structures using the multiplanar reconstruction technique and to measure some important surgical distances of sphenoid sinus including, roof, bottom, posterior wall, anterior wall, in terms of their relevancy to the Sudanese patients. Cor...