Which of the following is not a pathological finding seen in alzhetmer’s disease –
**Core Concept**
Alzheimer's disease is a neurodegenerative disorder characterized by the accumulation of amyloid-beta plaques and tau protein tangles in the brain, leading to neuronal loss and cognitive decline. The pathophysiology involves inflammation, oxidative stress, and disruption of neurotransmitter systems.
**Why the Correct Answer is Right**
The correct answer is related to the pathological findings in Alzheimer's disease. Amyloid-beta plaques, neurofibrillary tangles, neuronal loss, and gliosis are all characteristic features of the disease. These changes are associated with impaired synaptic plasticity, disrupted cholinergic neurotransmission, and ultimately, the progression of cognitive impairment.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a hallmark of Alzheimer's disease. Amyloid-beta plaques are one of the primary pathological features of the disease.
**Option B:** This option is incorrect because neurofibrillary tangles are a characteristic feature of Alzheimer's disease. They are composed of hyperphosphorylated tau protein and are found in the neurons of affected individuals.
**Option C:** This option is incorrect because gliosis, or the activation of astrocytes and microglia, is a common pathological finding in Alzheimer's disease. It is a response to the accumulation of amyloid-beta and the loss of neurons.
**Option D:** This option is incorrect because neuronal loss is a characteristic feature of Alzheimer's disease. It is the result of the accumulation of amyloid-beta and the activation of neurotoxic pathways.
**Clinical Pearl / High-Yield Fact**
A key pathological feature of Alzheimer's disease is the presence of amyloid-beta plaques, which can be detected using imaging techniques such as positron emission tomography (PET). The presence of these plaques is associated with cognitive decline and is a potential target for therapeutic intervention.
**Correct Answer: D. Neuronal hypertrophy**
Neuronal hypertrophy is not a characteristic feature of Alzheimer's disease. Instead, the disease is characterized by neuronal loss, which is a hallmark of the disease.