[Normal and pathological hippocampal imaging in geriatric patients]

Area of Science:

• Neuroimaging
• Neurology
• Geriatrics

Background:

• The hippocampus is crucial for memory formation and function.
• In older adults, dementia is a common cause of hippocampal pathology.
• Accurate diagnosis requires knowledge of diverse hippocampal disorders beyond dementia.

Purpose of the Study:

• To provide a pictorial review of normal and pathological hippocampal anatomy in older adults.
• To illustrate MRI findings across various hippocampal disorders, including degenerative, infectious, vascular, inflammatory, tumoral, toxic, and metabolic conditions.
• To aid clinicians in the differential diagnosis of hippocampal abnormalities in the elderly.

Main Methods:

• Review of magnetic resonance imaging (MRI) studies.
• Focus on characteristic MRI signal abnormalities and structural changes (atrophy) in the hippocampus.
• Categorization of pathologies based on etiology (degenerative, infectious, vascular, etc.).

Main Results:

• MRI is the gold standard for evaluating hippocampal structure and detecting abnormalities.
• Signal abnormalities often indicate acute or recent damage, while atrophy signifies chronic changes.
• Diverse pathologies present distinct MRI patterns, crucial for differential diagnosis.

Conclusions:

• This pictorial review highlights the spectrum of hippocampal abnormalities in older adults.
• Familiarity with MRI findings in various conditions is essential for accurate diagnosis and management.
• Comprehensive understanding of hippocampal imaging aids in differentiating dementia from other pathologies.