Moyamoya phenomenon

Case contributed by Townsville radiology training

Patient Data

Age: 11
Gender: Male

Multiple stenotic regions in the anterior circulation, mainly central vesessels (M1, A1 segments).

Enlarged perforator branches from L. MCA giving rise to small corkscrew parenchymal vessels. This appearance of puff of smoke classical of moyamoya phenomenon.

Enlarged pericallosal and anteror choroidal arteries again with collaterals.

Vertebrobasilar cirulcation (not shown) is not stenotic and is supplying collaterals to the anterior circulation well rostral to the occiptio-parietal sulcus. Similarly external carotid artery is fully patent and contributing to the anterior circulation.  

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Case information

rID: 19457
Published: 12th Sep 2012
Last edited: 23rd Sep 2015
Inclusion in quiz mode: Included

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