Table 2.4.4.2 Open in new tab MRI...

Table 2.4.4.2

MRI characteristics of lesions of the hypothalamus/pituitary

Type of lesion	Signal intensity on T₁	Signal intensity on T₂	Contrast enhancement	Pattern of enhancement	Shape	Dural enhancement
Hypophysitis	Relatively low	High	Marked	Homogeneous	Symmetric	Common
Histiocytosis	Isointense	Hyperintense	Moderate	Nonspecific	Stalk thickening	Common
Sarcoidosis	Isointense	Hyperintense	Moderate	Nonspecific	Stalk thickening	Leptomeningae
Wegener’s granulomatosis	Isointense	Hyperintense	Intense	Homogeneous	Superior infundibulum thickening	Common, linear
Tuberculosis	Isointense to hypointense	Hyperintense	Marked	Nonspecific	Nodular stalk thickening	Common
Pituitary Adenoma	Isointense	Usually isointense	Moderate	Focal	Variable	Rare

Type of lesion	Signal intensity on T₁	Signal intensity on T₂	Contrast enhancement	Pattern of enhancement	Shape	Dural enhancement
Hypophysitis	Relatively low	High	Marked	Homogeneous	Symmetric	Common
Histiocytosis	Isointense	Hyperintense	Moderate	Nonspecific	Stalk thickening	Common
Sarcoidosis	Isointense	Hyperintense	Moderate	Nonspecific	Stalk thickening	Leptomeningae
Wegener’s granulomatosis	Isointense	Hyperintense	Intense	Homogeneous	Superior infundibulum thickening	Common, linear
Tuberculosis	Isointense to hypointense	Hyperintense	Marked	Nonspecific	Nodular stalk thickening	Common
Pituitary Adenoma	Isointense	Usually isointense	Moderate	Focal	Variable	Rare

Data abstracted from Lury (7), Saiwai et al. (16), Shimono et al. (17), Kaltsas et al. (18), Bullmann et al. (19), Hoffman et al. (20), Murphy et al. (21), Lam et al. (22), Yilmazlar et al. (23).

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