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FIG 3. 8-year-old girl who initially presented with transient left-sided motor weakness. Examination revealed decreased visual acuity.
A, Lateral view of a right carotid angiogram shows partial disappearance of cortical branches of the ACA and MCA with well-developed moyamoya vessels at the base of the brain (ICA stage III). A left carotid angiogram also showed ICA stage III (not shown).
B, Lateral view of left vertebral angiogram shows advanced stenosis of bilateral PCAs with well-developed PCA moyamoya. Cortical branches of the PCA are partially opacified (PCA stage 3, bilaterally). Anastomoses between the PCA moyamoya and medullary arteries were well defined at a later phase (not shown).
C, Axial T2-weighted (2500/90/1) MR image reveals infarctions in the right AWS (thin arrow), bilateral post-MCAs, and left PWS (thick arrow). Infarctions in the right ant-MCA and the right PWS were also visible (not shown). No infarction in the PCA territory is evident on either side.
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