Visualization of nigrosome 1 and its loss in PD: Pathoanatomical correlation and in vivo 7T MRIAuthor Response

Editors' Note: The inability to visualize nigrosome 1 on a 7T brain MRI is suggestive of Parkinson disease, as described by Blazejewska et al. Mueller et al. report that similar sensitive and specific findings can be obtained with the more widely available 3T MRI. Replication of this finding on a larger cohort is warranted. In response to Liguori et al., Friedman et al. caution against diagnosing idiopathic intracranial hypertension syndrome on the basis of elevated opening pressure alone without other objective findings. —Chafic Karam, MD, and Robert C. Griggs, MD Blazejewska et al.1 identified a …