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A 47 year-old woman presented with headaches.
(Left) Axial T1 weighted MRI; (Right) T2 axial weighted MRI. Note the lesion which is dark on both T1 and T2 weighted images (arrows). This is consistent with hemosiderin, the residual from old blood. This is a picture of a cavernous angioma. They typically occur in the subcortical cerebral hemispheres and in the pons. With MRI, congenital cavernous angiomas are being more often recognized as a source of intracerebral hemorrhage.
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