Specific imaging features of sellar atypical teratoid/rhabdoid tumor or the lack of thereof

Table 2 Magnetic resonance imaging characteristics of pituitary macroadenoma and sellar atypical teratoid/rhabdoid tumor (see text for detail)

	Pituitary macroadenoma	Sellar atypical teratoid/rhabdoid tumor
T1	Isointense to brain gray matter	Isointense to brain gray matter
T1 after contrast	Enhancing	Enhancing
T2	Isointense to brain gray matter	Isointense to brain gray matter
Gross suprasellar extension	50%-75%	Approximately 100%
Gross cavernous sinus invasion	50%-75%	97%
Optic chiasm degeneration (T2 hyperintensity)	56%	Absence in limited cases
Optic chiasm thinning	37%	Absence in limited cases
Cavernous sinus remodeling	Common	Unlikely