Fig. 24.11
 Extrasellar extension of macroadenomas.
 Sagittal T1-weighted MR image (a) showing suprasellar extension with a ‘waist’ caused by the diaphragma sellae. Coronal T1-weighted MR image (b) demonstrating suprasellar and left cavernous sinus extension, encasing the left cavernous carotid artery. Coronal CT image (c) showing suprasellar, cavernous sinus, and sphenoid sinus extension.