Reviewed by the Help Dementia Editorial Team — our editors review every article for accuracy against guidance from the National Institute on Aging, the Alzheimer’s Association, and peer-reviewed sources.
This guide is part of our pillar: Brain Mri Report Decoded Terms Families Misread.
Leukoaraiosis is an older medical term that still shows up on MRI reports. It describes a pale, rarefied appearance of brain white matter and overlaps with what modern radiologists call white matter hyperintensities or small vessel disease.
Understanding leukoaraiosis helps families ask better questions and make calmer decisions. The detail below covers what doctors usually skip when explaining leukoaraiosis.
What the Word Means
From Greek roots: leuko (white) and araiosis (rarefaction). It describes the brain’s white matter looking thin or diluted on imaging.
Modern Equivalent
Most radiologists now call it white matter hyperintensities or chronic small vessel ischemic change.
Main Cause
Long-standing damage to small brain blood vessels from hypertension, diabetes, and aging.
Symptoms It Can Cause
Slower thinking, balance and gait problems, mood changes, and increased stroke risk.
What Helps
Tight blood pressure control, exercise, smoking cessation, and managing diabetes.
Frequently Asked Questions
Is leukoaraiosis serious?
Mild leukoaraiosis is common with age. Moderate to severe predicts cognitive decline and stroke.
Can leukoaraiosis be cured?
No, but progression is highly modifiable with vascular risk factor management.
For more, see CDC Alzheimer’s and Dementia.
