Five Cerebellar AVM Subtypes
Subtype | Numbers | Location | Arterial supply | Venous drainage | Eloquence |
20% | Unilateral, suboccipital cerebellar surface below | Cortical branches of SCA, AICA, PICA | Inferior hemispheric veins, inferior vermian veins | Eloquent only if extending to deep cerebellar nuclei | |
20% | Unilateral, tentorial surface | Hemispheric branches of SCA | Superior hemispheric vein | Non-eloquent | |
30% | Midline superior: lingula, central lobule, culmen, declive inferior: folium, tuber, pyramid, uvula, nodule. | Bilateral SCA (superior) PICA (inferior) | Superior: Superior vermian vein/Galen Inferior: inferior vermian vein/Torcula | Non-eloquent | |
8% | Cerebellar tonsils | Unilateral Ipsilateral PICA | Medial and lateral tonsilar veins Retro-tonsillar Vein | Non-eloquent | |
ㅤ | Petrosal surface | Unilateral Cortical branches of AICA | Anterior Hemispheric Vein, Vein of cerebellar pontine fissure Superior petrosal vein Superior petrosal sinus | Non-eloquent |
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