Figure 2From: A radiologic morphometric study of sellar, infrassellar and parasellar regions by magnetic resonance in adultsTypes of the sphenoid sinus. A, conchal. B, presellar. C, sellar. D, postsellar. E, diagram of thwe sella and sphenoid sinus in the sagittal plane with the lines (1 and 2) used to classify types of sinus. Speno-occipital synchondrosis (arrow).Back to article page