Presentation
Head trauma.
Patient Data
High attenuation abnormality with multiple small foci of calcification in the left parietal lobe cortex, with large venous collaterals extending into the superior sagittal sinus.
No acute hemorrhage.
The remainder of the intracranial appearances are normal.
Multiple serpiginous flow-voids in the left parieto-occipital region. Arterial feeders from branches of the left MCA. Large draining veins into the superior sagittal sinus at the vertex.
Minor gliotic change in the adjacent cerebral parenchyma. No evidence of acute hemorrhage was seen on T1-weighted images.
Case Discussion
Left parieto-occipital arteriovenous malformation. Like cavernomas, these may be incidental findings on CT head imaging performed for head trauma or other unrelated indications.
The focal high attenuation from smaller AVMS and cavernomas may be mistaken for subacute hemorrhage. Not infrequently calcification is observed on CT in the AVM.
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