How would you grade this AVM?
Spetzler-Martin grade 2 - one point for small nidus, and one point for eloquent brain (debatable but it is close to the cerebellar nuclei).
A cerebellar hemispheric arteriovenous malformation on the right (nidus = 13 mm). It is supplied principally by the enlarged right anterior inferior cerebellar artery but it may be a very small contribution from the left PICA. Drainage is superficial to the superior petrosal sinus with no significant deep venous drainage identified.