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The clinical diagnosis of vascular dementia
1University of Göteborg, Department of Clinical Neuroscience, Mölndal Hospital, Sweden.
Insights
Vascular dementia subtypes multi-infarct dementia and strategic-infarct dementia lack distinct pathology-symptom links. Subcortical white matter dementia, however, shows clear links, meeting disease criteria.
Area of Science:
- Neurology
- Pathology
- Gerontology
Background:
- Vascular dementia (VAD) encompasses several subtypes.
- Distinguishing these subtypes based on distinct clinical and pathological features is crucial for disease classification.
Purpose of the Study:
- To determine if the three VAD subtypes—multi-infarct dementia (MID), strategic-infarct dementia (SID), and subcortical white matter dementia (SWMD)—meet the basic criteria for distinct diseases.
- To assess the correspondence between pathological changes and clinical presentations within each VAD subtype.
Main Methods:
- Review of existing literature and case studies examining pathological findings and clinical symptoms of MID, SID, and SWMD.
- Comparative analysis of the pathological characteristics against the observed clinical manifestations for each subtype.
Main Results:
- No clear correlation was found between structural pathological changes and clinical signs/symptoms in the multi-infarct dementia (MID) and strategic-infarct dementia (SID) subtypes.
- Subcortical white matter dementia (SWMD) demonstrated a consistent link between subcortical white matter pathology and a specific pattern of symptoms, including mental slowness and pyramidal deficits.
Conclusions:
- The disease status of MID and SID is questionable due to the lack of distinct pathological-clinical correlations.
- Subcortical white matter dementia (SWMD) appears to meet the criteria for a distinct disease, supported by the observed correspondence between its pathology and clinical presentation.
Abstract:
The question was addressed whether the three vascular dementia (VAD) subtypes, multi-infarct dementia (MID), strategic-infarct dementia (SID), and subcortical white matter dementia (SWMD) fulfil the basic criteria for a disease: does a distinct pattern of clinical features match a distinct pathological picture for the various VAD subtypes? No obvious correspondence between structural pathological changes and symptoms or signs was found in the MID and SID subtypes. Therefore, the disease status of these VAD subtypes can be questioned. The VAD subtype SWMD, however, appeared to fulfil the basic criteria for a disease, as the subcortical white matter changes corresponded to the subcortical symptom pattern, with mental slowness, extrapyramidal and bilateral pyramidal deficits.