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Brain computed tomography in a 40-year-old woman on day 1 and day 3 of hypernatremia. Left panel: day 1, brain shrinkage is clearly visible. Right panel: day 3, brain edema and low-density areas in the frontal lesion have appeared.
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On admission, the initial brain computed tomography (CT) showed brain shrinkage; the following brain CT, which was carried out on the third day, showed diffuse cerebral edema with widespread low-density areas (Fig. 1).