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Summary
This summary is machine-generated.

Intraplaque hemorrhage (IPH) is linked to white matter lesion (WML) asymmetry, suggesting it may serve as a biomarker for vascular disease and dementia risk. This finding could guide early interventions for at-risk patients.

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Area of Science:

  • Neurology
  • Radiology
  • Vascular Biology

Background:

  • Cerebrovascular disease (CVD) is a major cause of death and cognitive decline.
  • White matter lesions (WML) are early indicators of vascular damage, linked to carotid artery plaque instability via intraplaque hemorrhage (IPH).
  • Vascular disease interventions may offer a treatment window for dementia.

Purpose of the Study:

  • To investigate the association between hemispheric WML asymmetry and IPH.
  • To identify novel biomarkers for vascular disease and dementia risk.
  • To analyze a large multicenter cohort for robust findings.

Main Methods:

  • FLAIR MRI scans from 264 subjects were analyzed.
  • White matter lesion (WML) biomarkers including volume (WML-ICV) and intensity (WML-Intensity, WML-IR) were computed.
  • WML asymmetry was measured using an asymmetry index measure (AIM), with statistical models adjusted for covariates.

Main Results:

  • Intraplaque hemorrhage positive (IPH+) patients showed significant rightward WML asymmetry in volume and intensity.
  • IPH+ subjects had more intense white matter lesions in the right hemisphere, particularly younger males.
  • Regression analysis confirmed IPH as a predictor of WML asymmetry, especially with right carotid artery IPH.

Conclusions:

  • Rightward WML asymmetry is strongly associated with IPH, supporting its role as a surrogate marker for vascular disease.
  • Automated WML biomarkers can identify high-risk individuals for early intervention in vascular disease and dementia.
  • Further validation in larger, longitudinal studies is recommended to enhance clinical applicability.