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Example of transient worsening in TCA, leading to complete MCA occlusion but subsequent improvement in an 8-year-old boy. (A) MRA shows a long segmental regular M1 stenosis (arrow) 1 day after stroke and ACA occlusion. (B) Three months later, there is complete occlusion of the origin of the MCA (arrow) and a tapered stenosis of the distal ICA. (C) Twenty months after stroke, MRA has almost normalized, with a residual focal MCA stenosis (arrow) and patent (hypoplastic?) ACA.
