Moyamoya disease and basal ganglia hemorrhage

Case contributed by Frank Gaillard
Diagnosis certain

Presentation

Sudden decrease in conscious state. No history of hypertension.

Patient Data

Age: 55 years
Gender: Male

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. 

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