Match each patient's core clinical presentation and disease progression pattern to the most likely neurocognitive disorder diagnosis.
- Insidious onset of prominent short-term memory impairment and word-finding difficulties, with later development of apraxia and agnosia.Alzheimer disease
- Fluctuating cognitive impairment, recurrent well-formed visual hallucinations, and spontaneous onset of parkinsonian motor features.Lewy body dementia
- Early and prominent behavioral changes, including severe disinhibition, loss of empathy, and hyperorality, with relative sparing of memory.Frontotemporal dementia
- Stepwise decline in executive function and processing speed, typically accompanied by focal neurological deficits on physical examination.Vascular dementia
Answer
The presentations match as follows: isolated memory loss to Alzheimer disease; fluctuating cognition with hallucinations to Lewy body dementia; early disinhibition to Frontotemporal dementia; and stepwise decline to Vascular dementia.
Each neurocognitive disorder has a distinct initial clinical signature based on the specific regions of the brain affected early in the disease process. Alzheimer disease typically begins in the medial temporal lobe, disrupting memory. Frontotemporal dementia affects the frontal and temporal lobes first, altering behavior and language. Lewy body dementia involves widespread cortical and subcortical alpha-synuclein deposition, leading to hallucinations and parkinsonism. Vascular dementia depends on stroke location but classically causes a stepwise decline corresponding to discrete ischemic events.
Step-by-Step Solution
Key Concept
Differentiation of major neurocognitive disorders based on their distinct initial clinical presentations and underlying affected brain regions.