Technique: Multiplanar and multisequence images have been obtained through the brain, including MRA and volumetric axial T1 for stereotaxic purposes.
Comparison: Comparison is made with the previous CT scan.
Findings: The arteriovenous malformation is again demonstrated in the posterior right superior frontal gyrus, with a compact 1.9 cm nidus in the precentral sulcus, in contact with the anterior surface of the right precentral gyrus (eloquent brain area - close to the motor cortex). The signal loss with blooming and the minimal surrounding high T2 signal are stable in appearance. Its arterial supply was previous demonstrated to be from distal branches from the right anterior and middle cerebral arteries. The venous drainage is made by cortical veins to the superior sagittal sinus, a venous varix appears present superficially.
The brain parenchyma is otherwise unremarkable. No abnormal diffusion restriction or acute/subacute haematomas.
The remainder circle of Willis and vertebrobasilar system opacity normally. No evidence of significant arterial stenosis or aneurysm.
Conclusion: Stable appearance of the right frontal arteriovenous malformation (Spetzler-Martin grade 2).