PMC4854034_01
Computer tomography scan showing acute intracerebral hemorrhage in the right parieto-occipital region
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F1
The patient is a 60-year-old gentleman who presented with acute intracerebral hemorrhage in the right parieto-occipital region [Figure 1].
Computer tomography angiography showing arteriovenous malformation in right parieto-occipital region
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F2
Computer tomography angiography revealed an AVM in the right parietal lobe with a feeding vessel originating from the right posterior cerebral artery and a cortical draining vein leading into the superior sagittal sinus [Figure 2].
Digital subtraction angiography showing arteriovenous malformation in right parieto-occipital region with single feeding artery from right posterior cerebral artery and single draining vein into the superior sagittal sinus
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F3
Digital subtraction angiography performed 5 days after the initial hemorrhage revealed a 1.0 cm nidus of abnormal vessels, which was supplied by a single feeder from the right posterior cerebral artery and drained by a single vein into the superior sagittal sinus, confirming the presence of an AVM [Figure 3].
Digital subtraction angiography performed just before gamma knife surgery planning showing complete absence of the arteriovenous malformation
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F4
However, the stereotactic digital subtraction angiography performed just before gamma knife surgery planning demonstrated absence of the AVM nidus and resolution of the network of abnormal draining vessels [Figure 4].