Figure 1 Magnetic resonance imaging (MRI) studies of the brain performed during hospitalization.(A) Contrast-enhanced MRI of the brain on admission demonstrates small, nonspecific foci of altered signal intensity within the bilateral deep and subcortical white matter. No areas of abnormal restricted diffusion are identified. There is no evidence of hyperacute, acute, or early subacute ischemic insult. No extra-axial or intracerebral hemorrhage is seen. (B) Contrast-enhanced MRI of the brain on day 6 of admission reveals a newly developed intra-axial acute hematoma in the right high frontoparietal subcortical region. (C, D) MR venography of the brain performed on day 6 demonstrates occlusion of the right superior anastomotic vein (vein of Trolard), findings consistent with venous hemorrhage.