Fig 2.

Microcatheter injection in the lenticulostriate artery shows patchy vascular network consistent with diffuse nature of AVM nidus (A). CTA was performed during contrast injection from microcatheter. Axial CTA image shows the nidus opacification in left basal ganglia sparing the internal capsule (arrow, B). Reconstruction with volume rendering technique (VRT) clearly shows the microcatheter and vascular network (C). Postembolization ICA angiogram shows obliteration of middle third of nidus (D). Postembolization MR (fluid-attenuated inversion recovery, axial image) showed fresh signal intensity change in the embolized portion of the basal ganglia (E). Left ICA angiogram performed 3 months after embolization shows marked shrinkage of the venous aneurysm with complete thrombosis of the pseudoaneurysm (F).