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FIG 3. Images from the same case of MELAS-MERRF overlapping syndrome shown Figure 2, obtained 1 year later during a subsequent study. MR spectroscopic images show a lactate doublet in the CSF (lateral ventricles, areas 2 and 3) and periventricular white matter (areas 5 and 6), bilaterally. R., right; L., left; Cho, choline; Cr, creatine; NAA, N-acetylaspartate; W.M., white matter; T1 MRI, T1-weighted MR image; Lac, lactate.
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