Patient 3, a 72-year-old woman with histopathologically proved CAA and a large hyperacute right frontal intracerebral macrohemorrhage (thick arrows). Patient 3, a 72-year-old woman with histopathologically proved CAA and a large hyperacute right frontal intracerebral macrohemorrhage (thick arrows). A,B, T2*-weighted images demonstrate the hyperacute lobar hemorrhage (thick arrows), subarachnoid hemosiderosis (dotted lines), and superficial cortical hemosiderosis (thin arrows). J. Linn et al. AJNR Am J Neuroradiol 2008;29:184-186 ©2008 by American Society of Neuroradiology