Figure 2

Digital subtraction angiogram: Early arterial phase of the left internal carotid injection revealing an intradural nongalenic arteriovenous fistula supplied from the left MCA and diminished flow in the left ACA due to the high-flow fistula (A). The oblique view of the late arterial phase showing the varix draining into the left lateral sinus (B). Post-operative left internal carotid angiogram revealing the left ACA filling in normal pattern, and the left MCA re-filling to the point that the lesion was previously resected (C and D).