Fig. 7.

Basal temporal AVM. This AVM (Spetzler-Martin Grade III–, supplementary Grade III) was based on the basal surface of the temporal lobe (A), as seen on a coronal T2-weighted MRI study, and was supplied by posterior temporal branches of the PCA, as seen on DSAs (left VA injection; anteroposterior [B] and lateral [C] views). Basal temporal AVMs are not visible on the lateral temporal lobe, as exposed through a temporal craniotomy. Subtemporal dissection exposes the posterior temporal feeding arteries and draining temporal basal veins (D).