Vascular malformations can also cause intracranial hemorrhages (Fig. 6.9). Cavernous angioma is a vascular malformation that contains blood cavities sur rounded by a single layer of endothelium [79-83]. MR imaging findings are well known and characterized as a central reticulated core with a peripheral rim of hypointensity due to the deposition of hemosiderin [79,82,83]. DW and b0 images are useful for detecting hemorrhages related to vascular malformations.
Figure 6.9 a-e
Multiple cavernous angiomas.The T2-weighted MR image (a) in a 30-year-old woman with seizures shows a hyperintense lesion in the left frontal lobe with a surrounding hypointense rim (arrows).This is a characteristic finding for a cavernous angioma.The lesion is hyperintense on the T1-weighted image (b) (arrow) and hypointense on the DW image (c) (arrow). The ADC map (d) shows heterogeneous intensity and the GRE image (e) shows marked hypointensity in the left frontal lobe (arrow).The hypointensities in the right and left temporo-occipital region (arrowheads) suggest multiple cavernous angiomas
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