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[Frontal lobe dementia--two cases diagnosed by SPECT]
1Department of Neurology, Wakayama Rosi Hospital.
No to Shinkei = Brain and Nerve
|December 1, 1993
Summary
This study highlights how iodine-123-amphetamine single-photon emission computed tomography (SPECT) can diagnose frontal lobe dementia. SPECT imaging revealed selective hypoperfusion in the frontal and temporal lobes, aiding differential diagnosis.
Area of Science:
- Neurology
- Neuroimaging
- Geriatrics
Background:
- Frontal lobe dementia presents with progressive cognitive and behavioral decline.
- Differential diagnosis is challenging, often requiring advanced imaging techniques.
Observation:
- Two elderly male patients exhibited progressive loss of vigor, speech changes, personality alterations, anosognosia, memory loss, and disorientation.
- Clinical and neuroimaging findings included cerebral atrophy predominantly in frontal and temporal lobes, with minimal cerebrovascular changes.
- Electroencephalograms (EEGs) showed diffuse slowing, and cerebrospinal fluid analysis was normal.
Findings:
- Iodine-123-amphetamine single-photon emission computed tomography (SPECT) demonstrated selective hypoperfusion in the frontal and temporal lobes in both patients.
- SPECT imaging proved crucial in differentiating frontal lobe dementia from other neurodegenerative conditions.
Implications:
- SPECT imaging is a valuable tool for diagnosing frontal lobe dementia and understanding its pathophysiology.
- This technique aids in distinguishing between various forms of dementia, including non-Alzheimer's frontal lobe dementia, progressive subcortical gliosis, Pick's disease, and Alzheimer's disease with frontal predominance.