Fig. 1
From: Retromaxillary recess of the sphenoid sinus: an overlooked recess
A Axial MSCT showing bilateral retro-maxillary sphenoid recesses directed anteriorly and laterally (arrows) with a bony septum between it and maxillary sinus. B Showing LT sided retro-maxillary sphenoid recess and its antero-posterior dimension, note that right air filled recess (arrow) related to ethmoid not maxillary sinus and considered as lateral pneumotization of sphenoid sinus. C Showing left retro-maxillary sphenoid recess; recess width and its neck width. D Sagittal reformatted MSCT image (bone window) showing retro-maxillary sphenoid recess directed downward with a bony septum separating recess from maxillary sinus