## **Core Concept**
Alzheimer's Disease (AD) is a progressive neurodegenerative disorder characterized by cognitive decline and memory loss. Pathologically, it is marked by the accumulation of amyloid-beta plaques and neurofibrillary tangles in the brain. Understanding the neuropathological features of AD is crucial for distinguishing it from other forms of dementia.

## **Why the Correct Answer is Right**
The correct answer, , is not a feature of Alzheimer's Disease. Typically, AD brains show an increase in amyloid-beta plaques, neurofibrillary tangles, and often, cerebral atrophy. The absence of a particular feature or the presence of a distinct characteristic not commonly associated with AD would make it the correct choice.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it is indeed seen in Alzheimer's Disease. For instance, amyloid-beta plaques are a hallmark of AD.
- **Option B:** This option is incorrect as well since neurofibrillary tangles are also a characteristic feature of AD, composed of hyperphosphorylated tau protein.
- **Option C:** Similarly, this option is incorrect because cerebral atrophy, particularly in the temporal lobe, is commonly observed in AD.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that Alzheimer's Disease is primarily diagnosed based on clinical presentation and supported by imaging and laboratory tests. A definitive diagnosis can only be made post-mortem by identifying amyloid plaques and neurofibrillary tangles in the brain. Early and accurate diagnosis is crucial for managing symptoms and planning care.

## **Correct Answer:** . Lewy Bodies