Trans-sphenoidal encephalocele

MR images of trans-sphenoidal encephalocele (midsagittal T1-weighted image, [A]; coronal T2-weighted images, [B,C]). Note reversed course of pituitary stalk to the bright spot of the posterior pituitary (arrow). Coronal images show herniated optic nerves (arrowhead) and the third ventricle (asterisk).