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Figure 1: Cranial MR imaging reveals altered signal involving the cerebellar parenchyma with alternating bands of isointensity and hypointensity on T1, (a) and corresponding isointensity and hyperintensity on T2-weighted images, (b) Post gadolinium images (c) do not show any parenchymal enhancement but have linear hyperintensities along the sulcal space secondary to vascular congestion. Proton MR spectroscopy, (d) shows elevated choline with high Cho:NAA ratio

Figure 1: Cranial MR imaging reveals altered signal involving the cerebellar parenchyma with alternating bands of isointensity and hypointensity on T1, (a) and corresponding isointensity and hyperintensity on T2-weighted images, (b) Post gadolinium images (c) do not show any parenchymal enhancement but have linear hyperintensities along the sulcal space secondary to vascular congestion. Proton MR spectroscopy, (d) shows elevated choline with high Cho:NAA ratio