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Cerebral white matter hyperintensity in Parkinson's disease: a major risk factor for mild cognitive impairment

Nagaendran Kandiah1, Elijah Mak, Amanda Ng

  • 1Department of Neurology, National Neuroscience Institute, Singapore. Nagaendran_Kandiah@nni.com.sg

Parkinsonism & Related Disorders
|April 30, 2013
PubMed
Abstract

Insights

White matter hyperintensity (WMH) volume is a significant risk factor for mild cognitive impairment (MCI) in Parkinson's disease (PD). Increased WMH correlates with poorer cognitive function, necessitating regular MCI screening in PD patients with WMH.

Area of Science:

  • Neurology
  • Neuroimaging
  • Cognitive Science

Background:

  • Parkinson's disease (PD) significantly impacts quality of life due to associated mild cognitive impairment (MCI) and dementia.
  • Cerebral ischemia, indicated by white matter hyperintensity (WMH), is an understudied risk factor for MCI in PD.
  • This study investigates the relationship between WMH volume/distribution and MCI in early PD.

Purpose of the Study:

  • To determine if white matter hyperintensity (WMH) volume and distribution are risk factors for mild cognitive impairment (MCI) in early Parkinson's disease (PD).
  • To assess the association between WMH and cognitive performance in PD patients.

Main Methods:

  • Prospective study of 91 early idiopathic PD patients.
  • Baseline MRI-FLAIR, clinical, and detailed neuropsychological evaluations were performed.
  • Analysis included demographics, vascular risk factors, cognitive data, and WMH volumes.

Main Results:

  • 24 patients (26.4%) were diagnosed with PD-MCI; they had higher rates of diabetes, hypertension, and hyperlipidemia.
  • PD-MCI patients exhibited significantly greater periventricular and deep subcortical WMH volumes.
  • WMH was independently associated with PD-MCI and correlated with lower executive function, memory, and language performance.

Conclusions:

  • White matter hyperintensity (WMH) is a crucial risk factor for mild cognitive impairment in Parkinson's disease (PD-MCI), independent of vascular factors.
  • Regular screening for MCI is recommended for PD patients with WMH.

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