KEY FACTS Terminology Synonym: Arrested pneumatization of sphenoid Definition: Well-corticated, fat-containing lesion of sphenoid bone Occurs in regions where primary or accessory pneumatization known to occur Usually adjacent to posterior sinus wall You’re Reading a Preview Become a Clinical Tree…
KEY FACTS Terminology Synonyms: Transsphenoidal canal, craniopharyngeal duct, hypophyseal canal, basipharyngeal canal Persistent craniopharyngeal canal: Developmental anomaly with persistent tract from nasopharynx to pituitary fossa Believed to be persistent adenohypophyseal stalk You’re Reading a Preview Become a Clinical Tree membership…
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KEY FACTS Terminology Definition: Invasive, benign pituitary adenoma with inferior extension into skull base You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Definition: Benign cystic mass arising dorsal to clivus with intradural component in prepontine cistern Considered to be ectopic notochordal remnant You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become…
Imaging Approaches and Indications CT is primary imaging tool for evaluating bony details of the skull base (SB). Multislice CT scanners allow thin slices (≤ 1 mm) & provide multiplanar reformatted images. These function as a mainstay for evaluating bony…
KEY FACTS Terminology Definition: Malignant primary retinal neoplasm Trilateral/quadrilateral retinoblastoma (RB): Bilateral ocular RB + pineal ± suprasellar tumors You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are…
KEY FACTS Terminology Optic nerve sheath meningioma a.k.a. perioptic meningioma Benign, slow-growing tumor of optic nerve sheath Distinct entity from intracranial (sphenoorbital) meningioma that extends through orbital apex You’re Reading a Preview Become a Clinical Tree membership for Full access…
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KEY FACTS Imaging MR findings Focal or segmental T2 hyperintensity of optic nerve Central or diffuse optic nerve enhancement Optic nerve diffusely & mildly enlarged Increased diffusivity (diffusion restriction) on DWI sequence due to disruption of myelinated axons You’re Reading…