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.