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Anterior choroidal artery infarction presenting as a progressive cognitive deficit
S Sarangi1, E C San Pedro, J M Mountz
1Department of Radiology, University of Alabama at Birmingham Medical Center, USA.
Clinical Nuclear Medicine
|March 4, 2000
Summary
Neuroimaging identified an anterior choroidal artery infarction in a patient with Alzheimer's disease symptoms. This case highlights the importance of SPECT and MRI in differentiating vascular dementia from Alzheimer's disease.
Area of Science:
- Neurology
- Radiology
- Nuclear Medicine
Background:
- Alzheimer's disease (AD) diagnosis can be challenging, especially when symptoms overlap with other neurological conditions.
- Neuroimaging plays a crucial role in differentiating causes of cognitive decline.
Observation:
- A patient presented with progressive cognitive decline, meeting criteria for Alzheimer's disease.
- Neuroimaging studies, including Tc-99m HMPAO SPECT, F-18 FDG PET, and MRI, were performed.
Findings:
- SPECT revealed hypoperfusion in the right parahippocampal cortex.
- F-18 FDG PET showed more extensive metabolic reduction than SPECT.
- MRI confirmed an anterior choroidal artery infarction, inconsistent with AD findings.
Implications:
- Regional cerebral blood flow SPECT is valuable for evaluating memory impairment in the elderly.
- Distinguishing between AD and vascular dementia based on neuroimaging patterns is critical.
- Parahippocampal artery infarction can mimic AD clinically, underscoring the need for accurate neuroimaging.