Cerebellar arteriovenous malformation
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Headache investigation revealed hyperintensity in the left posterior fossa on CT study (not available).
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There is an arteriovenous malformation in the anterior lobe of the left cerebellar hemisphere with a diffuse nidus measuring 2.5 x 2.0 cm. Both the left AICA and SCA are prominent, with the latter probably being the main feeding artery. Veins are draining both to the torcula herophili, left transverse sinus and left cavernous sinus; the most prominent vein goes to the superior petrosal sinus and consequently cavernous sinus. Spetzler-Martin score 2.
- the only eloquent structures in the cerebellum are the deep nuclei
- low likelihood of large AVMs involving the cerebellum
- venous drainage depth generally is artificially elevated by this system: deep venous drainage is all but “cerebellar hemispheric veins that drain directly into the straight or transverse sinus” 1
- 1. Rodríguez-Hernández A, Kim H, Pourmohamad T et-al. Cerebellar arteriovenous malformations: anatomic subtypes, surgical results, and increased predictive accuracy of the supplementary grading system. Neurosurgery. 2012;71 (6): 1111-24. doi:10.1227/NEU.0b013e318271c081 - Free text at pubmed - Pubmed citation