Cerebral amyloid angiopathy is characterized by deposition of homogeneous eosinophilic material in the media and adventitia of arterioles and small arteries of the cortex and leptomeninges. The usual neurolog-
Thrombotic thrombocytopenic purpura in a 53-year-old woman with altered mental status and seizures. a Computed tomography shows a hemorrhage in the right parieto-occipital area (arrow) and a wedged-shaped area of low density more peripherally in the right occipito-parietal area (arrowheads). b T2-weighted and c FLAIR images show corresponding hyperintense lesions in the deep white matter and right occipito-parietal area (arrowheads). Hemorrhage is seen as a hy-pointense lesion (arrow).d On DW image, deep white matter lesions are isointense, mainly representing vasogenic edema, while a cortical lesion in the right occipitoparietal area is hyperintense, representing acute infarction (arrowheads). Hemorrhage is hy-pointense with a hyperintense rim (arrow)
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