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Clinical, MR, and angiographic findings of aggressive DAVF involving the cerebellar hemisphere
Characteristic Patient 1 Patient 2 Patient 3 Patient 4 Patient 5 Patient 6
Age (y)/sex 73/M 67/M 72/M 88/F 79/M 59/M
 Clinical findings Incoordination, ataxia Vomitting, dizziness Imbalance, fatigue Imbalance, ataxia Hemiplegia, ataxia Ataxia
 Hemisphere Right Right Right Left Left Left
MR findings 
 Topography Inferior aspect of cerebellar hemisphere Inferior aspect of cerebellar hemisphere Inferior aspect of cerebellar hemisphere Inferior aspect of cerebellar hemisphere Inferior aspect of cerebellar hemisphere Inferior aspect of cerebellar hemisphere
 Signal void lesions ++ + ++ + + +++
 T1 SI Low Low Low Low Low Low
 T2 SI High High High High High High
 Gd-enhancement Peripheral Peripheral Peripheral Peripheral Peripheral Peripheral
Angiographic findings 
 ICA feeders No No No No No C5 branch
 ECA feeders Occipital a., ascending pharyngeal a. None Occipital a., ascending pharyngeal a. Occipital a. Occipital a. Occipital a., ascending pharyngeal a.
 VA feeders Artery of falx cerebelli, meningeal artery of cerebellar fossa Artery of falx cerebelli Artery of falx cerebelli, meningeal artery of cerebellar fossa Artery of falx cerebelli Meningeal artery of cerebellar fossa Meningeal artery of cerebellar fossa
 Venous drainage Inferior hemispheric vein Inferior hemispheric vein Inferior vermian vein to inferior hemispheric vein Inferior hemispheric vein Inferior hemispheric vein Inferior vermian vein to inferior hemispheric vein
Notes.—+ indicates few; ++, prominent; +++, significant; T1, T1-weighted images; T2, T2-weighted images; SI, signal intensity; Gd, gadolinium-enhanced T1-weighted images; ICA, internal carotid artery; ECA, external carotid artery; VA, vertebral artery; a, artery.