A 65-year-old woman experienced an acute onset of expressive dysphasia 48 hours after a left carotid endarterectomy. A computed tomographic (CT) head scan revealed a 35-cm3left frontal hematoma (Figure, A). The patient improved with conservative management. A CT scan performed 9 weeks later demonstrated hypodensity with ring enhancement postcontrast (Figure, B and C). Subsequent magnetic resonance imaging findings of negative mass effect and uniform hemosiderin staining weighed against an associated tumor or abscess1 (Figure, D).
Wong AA, Henderson RD, O'Sullivan JD, Read SJ, Rajah T. Ring Enhancement After Hemorrhagic Stroke. Arch Neurol. 2004;61(11):1790. doi:10.1001/archneur.61.11.1790