A 63-YEAR-OLD woman with a history of lacunar stroke and moderate residual left-sided spastic hemiparesis underwent invasive cardiologic catheterization for evaluation of coronary heart disease. After the procedure, the patient's hemiparesis dramatically worsened, prompting emergency cranial computed tomography (Figure 1), which showed a marked hyperdensity in the right hemiphere.
Heckmann JG, Neundörfer B, Lang CJG, Werner D. Hyperdensity of Cortex With a Swollen HemisphereWhat Happened?. Arch Neurol. 2002;59(1):149-150. doi:10.1001/archneur.59.1.149