Figure 1

Pre-operative magnetic resonance imaging (MRI) of the head with and without contrast. Prior to endoscopic transnasal resection, midsagittal (A), axial (B) and coronal (C) MRI imaging reveal a homogeneous mass involving the sella turcica with extension into the right cavernous sinus which measures 2.8 cm × 2.1 cm × 1.7 cm. The mass does extend up into the suprasellar cistern, but does not impinge upon the optic apparatus. There is partial encasement of the cavernous internal carotid artery on the right side, but the caliber of the vessel is not compromised.