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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
* 196 analyzed.
† 88 analyzed.