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White matter hyperintensities (WMHs) on brain MRI may contribute to cognitive difficulties. In this cross-sectional study, researchers investigated whether disease severity, cortical thinning, and reduced cognition were associated with WMHs in 64 patients with behavioral variant frontotemporal dementia (bvFTD), 65 with Alzheimer disease (AD), and 66 controls. Vascular risk was dichotomized based on lifetime histories of hypertension, high cholesterol, diabetes mellitus, and smoking. A subset of participants underwent disease-specific genetic screening and neuropathologic assessment.
The bvFTD group had greater disease severity than the AD group and larger WMH volumes than both the AD and control groups. Both the bvFTD and AD groups performed…