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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: Curr Opin Neurol. 2015 Jun;28(3):288–294. doi: 10.1097/WCO.0000000000000201

Figure 1. JC Virus Granule Cell Neuronopathy (JCV GCN).

Figure 1

MRI demonstrates progressive cerebellar atrophy without intra-parenchymal lesions. (A) Pre-contrast T1 sagittal image illustrating the size of the cerebellum at symptoms onset. (B) Pre-contrast T1 sagittal image done 4 months later and a week after positive CSF JC Virus PCR shows marked cerebellar atrophy (arrow).