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"Ivy Sign" on Fluid-Attenuated Inversion-Recovery Images in Childhood Moyamoya Disease

Masayuki MaedaGo,a and Chika Tsuchidaa

a From the Department of Radiology (M.M.), Maizuru Kyosai Hospital, Kyoto, Japan and the Department of Radiology (C.T.), Hayashi Hospital, Fukui, Japan.



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  		FIG 1. Fifteen-year-old girl with transient motor weakness of upper and lower left extremities.

A and B, FLAIR images (10000/126/2, TI = 2200) show extensive areas of increased signal intensity in leptomeninges and perivascular spaces, predominantly in right hemisphere.

C and D, Contrast-enhanced T1-weighted images (333/14/2, no use of flow compensation) show diffuse leptomeningeal enhancement and strong enhancement of perforating arteries in basal ganglias and deep white matter. Areas of left PCA and some areas of left MCA are spared leptomeningeal enhancement.





Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X