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FIG 1. 12-year-old girl with an initial manifestation of transient motor weakness in right upper and lower extremities.
A, Left carotid angiogram (anteroposterior view) shows stenoocclusive changes at the terminal part of the ICA and the proximal part of the ACA and MCA. Moyamoya vessels at the base of the brain and a partial disappearance of cortical branches of the ACA and MCA are also evident (ICA stage III). A right carotid angiogram showed ICA stage III and the right PCA was also well opacified without stenoocclusive changes (PCA stage 1) (not shown).
B, Left vertebral angiogram (Towne projection) shows left PCA with no stenoocclusive changes (PCA stage 1). Good leptomeningeal collaterals to the anterior circulation are present.
C, Axial T2-weighted (3500/90/1) MR image reveals cerebral infarction in the left AWS but no abnormalities in the right.
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