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Dementia associated with human immunodeficiency virus: subcortical or cortical?
E Poutiainen1, M Haltia, I Elovaara
1Department of Neurology, University of Helsinki, Finland.
Acta Psychiatrica Scandinavica
|April 1, 1991
Summary
Human immunodeficiency virus (HIV) infection can cause two dementia types: subcortical and cortical. Neuropathology reveals diffuse leukoencephalopathy for subcortical dementia and microglial nodules for cortical dementia in HIV patients.
Area of Science:
- Neurology
- Infectious Diseases
- Neuroscience
Background:
- Human Immunodeficiency Virus (HIV) infection is associated with neurological complications, including dementia.
- Previous understanding suggested primarily subcortical dementia in HIV-associated neurocognitive disorders.
Observation:
- Two distinct neuropathological patterns were observed in HIV-infected patients presenting with dementia.
- Case 1: Subcortical dementia (slowed cognition, recall issues) correlated with diffuse leukoencephalopathy.
- Case 2: Cortical dementia (impaired abstraction, memory, focal deficits) correlated with microglial nodules.
Findings:
- HIV infection can manifest as both subcortical and cortical dementia, challenging earlier assumptions.
- Subcortical dementia in HIV is linked to diffuse white matter changes (leukoencephalopathy).
- Cortical dementia in HIV is associated with inflammatory microglial nodules in grey matter.
Implications:
- This study broadens the understanding of HIV-associated dementia beyond subcortical involvement.
- Recognizing cortical dysfunction is crucial for accurate diagnosis and management of cognitive impairment in HIV.
- Further research into the mechanisms of cortical damage in HIV infection is warranted.