Complications: 3% rupture rate per year (cumulative)
Treatment:
Clinical: — Common cause of spontaneous intracranial hemorrhage and hemorrhagic stroke in children — Risk of hemorrhage with intracranial AVM is about 2% per year
Radiology Cases of Intracranial Arteriovenous Malformation
Axial T2 MRI of the brain (above left) shows large vascular flow voids representing the nidus of the lesion along the right hemisphere of the brain and a dilated sagittal sinus. Sagittal US of the midline of the brain (above right) shows a large vascular structure with mixed arterial and venous flow within it that is compressing and displacing the sagittal sinus beneath it. MR angiogram with contrast of the brain (below left) shows a large nidus of arterial vessels along the right cerebral hemisphere fed primarily by the right middle cerebral artery that rapidly drain into a dilated sagittal sinus on the MR venogram (below right).Axial CT without contrast of the brain (above left) shows a large area of high density acute hemorrhage in the left cerebral hemisphere surrounded by a ring of low density edema. There is midline shift to the right. Axial (above right), coronal (below left) and 3D CT angiogram show a tangle of vessels arising from the left middle cerebral artery in the center of the hemorrhage representing the nidus of the lesion.
