Presentation
Sudden decrease in conscious state. No history of hypertension.
Patient Data
CT without contrast obtained at the time of admission demonstrates a left-sided basal ganglia hemorrhage, with extension into the ventricle.
CT angiography demonstrates characteristic appearances of moyamoya disease, with obliteration of the supraclinoid internal carotid arteries, and numerous collaterals from the posterior circulation and external carotid circulation.
Case Discussion
Whereas moyamoya disease most commonly presents with infarcts in the pediatric patients, hemorrhage is a common complication in adults from the abnormal collaterals.