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Brain MRI and18 F-FDG-PET-scan of the proband in the transverse plane. A: The MRI scan included a diffusion weighted sequence (DWI) and a T2* weighted sequence. No focal lesions were observed; however, the cerebellar hemispheres and vermis appeared atrophic (arrow heads). B: 18 F-FDG-PET-scan showing strikingly reduced metabolism in the cerebellum suggesting pathology primarily localized to the cerebellum.
