Imaging of the Sellar Region
Fig. 2.1 CT image in sagittal-plane reformation shows the shape and size of the sella, with the pituitary gland and stalk clearly visualized In evaluating sellar lesions, CT has an…
Nonfunctioning Pituitary Adenomas
Fig. 10.1 Nonfunctioning pituitary adenoma. (a) Sagittal T1-weighted post-gadolinium image. (b) Coronal T1-weighted post-gadolinium image. A hypoenhancing sellar mass remodels the sellar floor and abuts the cavernous internal carotid arteries…
Metastatic Tumors to the Pituitary Gland
Fig. 50.1 Metastasis from breast cancer. (a) Sagittal T1-weighted gadolinium-enhanced MR image. (b) Coronal T1-weighted gadolinium-enhanced image. A large, heterogeneously enhancing mass is centered in the sella with suprasellar extension….
Atypical Pituitary Adenomas
Fig. 18.1 Atypical pituitary adenoma. (a) Sagittal T1-weighted post-gadolinium image. (b) Coronal T1-weighted post-gadolinium image. A large, heterogeneously enhancing sellar mass demonstrates suprasellar extension and encasement of the right cavernous…
Cerebral Aneurysms with Intrasellar Extension
Fig. 59.1 The progressive growth pattern of cavernous and clinoid segment internal carotid artery (ICA) (infradiaphragmatic) aneurysms (a–c)medially into the sella, causing compression of the pituitary gland (Courtesy of Dr….
Meningoceles and Encephaloceles
Fig. 66.1 Encephalocele. Sagittal T1-weighted MR image (a) and sagittal T2-weighted MR image (b) showing a basal encephalocele extending into the nasopharynx (From Chen et al. [10]; with permission) Fig….
Granulomatous Conditions of the Sellar Region
Fig. 56.1 Neurosarcoidosis. (a) Sagittal T1-weighted precontrast MR image. (b) Sagittal T1-weighted gadolinium-enhanced image. (c) Axial T1-weighted gadolinium-enhanced image. On (a) and (b), the pituitary stalk and gland are diffusely…
Sellar Region Arachnoid Cysts
Fig. 25.1 Arachnoid cyst. (a) Sagittal T1-weighted post-gadolinium image. (b) Coronal T1-weighted post-gadolinium image. A nonenhancing lesion is located in the sella with suprasellar extension. The signal intensity of the…
Nasopharyngeal Carcinoma and Squamous Cell Carcinoma of the Paranasal Sinuses
Fig. 44.1 Nasopharyngeal carcinoma (NPC). (a) Sagittal T1-weighted gadolinium-enhanced MR image. (b) Coronal T1-weighted gadolinium-enhanced image. A large enhancing mass is centered in the sphenoid sinus, replacing most of the…
Spontaneous, Traumatic, and Postoperative CSF Rhinorrhea
Fig. 73.1 CSF leak. (a) Sagittal CT cisternogram image. (b) Coronal CT cisternogram image. Postoperative changes from prior right ethmoid resection and medial maxillary antrostomy are present. In both images,…
