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Recurrent cortical subarachnoid hemorrhage in cerebral amyloid angiopathy (CT and MRI)

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CT and MRI in a 74-year-old woman suffering from recurrent cortical subarachnoid hemorrhage in cerebral amyloid angiopathy. (a-d) The first cortical subarachnoid hemorrhage in the right frontal area on (a) axial CT (arrow) with (b) sulcal hyperintense signal changes on FLAIR image (arrow) and (c, d) sulcal signal loss on T2*-weighted images (arrow) with additional cortical superficial siderosis on the left (arrowhead). (e-g) The second cortical subarachnoid hemorrhage in the paramedian left frontal area on (e) axial FLAIR and (g) axial T2*-weighted image (arrowhead). (f, g) Note the characteristic bilinear track-line appearance of cortical superficial siderosis in the chronic stage on T2*-weighted images (arrow). (h-k) The third cortical subarachnoid hemorrhage in the left frontodorsal area on (h) axial CT (arrow) with (i-k) signal loss on susceptibility-weighted imaging (arrow) and progressive cortical superficial siderosis bilaterally. (Source: Weidauer S, Neuhaus E, Hattingen E. Cerebral superficial siderosis: etiology, neuroradiological features and clinical findings. Clin Neuroradiol 2023;33[2]:293-306. Creative Commons Attribution 4.0 International [CC BY 4.0] license, creativecommons.org/licenses/by/4.0.)