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Balo concentric sclerosis (1)

Enhanced T2-weighted (left) and T1-weighted (right) scans of 42-year-old woman who developed gradual weakness and incoordination of her left arm and leg. A brain MRI scan lead to a stereotaxic brain biopsy that was read as consistent with Balo concentric sclerosis. Scan is of patient in stereotactic frame prior to biopsy. (Contributed by Dr. Michael Kaufman.)

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