Mixed dementia: Alzheimer's and cerebrovascular disease

Area of Science:

• Neurology
• Geriatrics
• Pathology

Background:

• Mixed dementia, typically Alzheimer's disease co-occurring with cerebrovascular disease (CVD), is increasingly recognized.
• Age is a significant risk factor for both neurodegenerative dementias and CVD, suggesting mixed dementia is highly prevalent.
• Current diagnostic pathways for mixed dementia include initial presentation with both pathologies or later discovery of ischemic lesions.

Purpose of the Study:

• To analyze the common diagnostic routes for mixed dementia.
• To highlight the implications of current diagnostic practices for developing evidence-based criteria.

Main Methods:

• Review of traditional definitions and clinical diagnostic pathways for mixed dementia.
• Analysis of how neuroimaging findings influence mixed dementia diagnosis.

Main Results:

• Mixed dementia is often defined by the coexistence of Alzheimer's disease and cerebrovascular disease.
• Patients are diagnosed either with concurrent evidence of both conditions or a neurodegenerative diagnosis complicated by identified ischemic lesions.
• The prevalence of mixed dementia is likely high due to shared age-related risk factors.

Conclusions:

• The common diagnostic routes for mixed dementia underscore the need for updated, evidence-based diagnostic criteria.
• Refining diagnostic criteria is crucial for accurate patient classification and effective treatment strategies.
• Understanding the interplay between Alzheimer's disease and cerebrovascular disease is key to managing mixed dementia.