TABLE 3:

Morphology of intracranial lesions in 163 patients with 474 MR imaging studies

Lesion	MR Imaging Studies	Patients
Craniofacial bones and/or skull base	125	91
Paranasal sinuses	196	88
Ethmoidal	90	64
Maxillar	53	40
Sphenoidal	19	13
Intracranial and extra-axial changes
Epidural	44	27
Subdural	31	21
Choroid plexus	24	10
Pineal gland
Enlarged >10 mm	48	23
Cystic	102	46
Solid	111	56
Hypothalamic-pituitary region
Anterior pituitary, assessable	241	139
Empty sella	11	8
Small	75	39
Normal	134	73
Enlarged	21	14
Posterior pituitary, assessable	248	124
Bright spot present	46	26
Bright spot absent	239	98
Pituitary stalk, assessable	393	137
Normal	188	87
Thickened >3 mm	140	68
Cranial-caudal difference	59	32
Threadlike <1 mm	65	40
Hypothalamic mass lesions	40	17
Intracranial and intra-axial changes
WM changes, vascular pattern
Visible VRSs	112^*	54^†
Space-occupying lesions	26	8
Leukoencephalopathy-like pattern
Periventricular	24	8
Brain stem, pons	74	44
Cerebellar WN	76	39
GM changes
Basal ganglia	74	42
Cerebellar dentate nuclei	139	65