Pick’s body in Pick’s disease is –
**Core Concept**
Pick's disease is a neurodegenerative disorder characterized by the accumulation of abnormal tau protein in the brain, leading to neuronal loss and cognitive decline. The presence of Pick's body is a hallmark histopathological feature of this disease.
**Why the Correct Answer is Right**
Pick's body is a cytoplasmic inclusion body found in the neurons of individuals with Pick's disease. It is composed of abnormally phosphorylated tau protein, which is a microtubule-associated protein that plays a crucial role in maintaining the structure and stability of microtubules within neurons. The accumulation of Pick's body is thought to disrupt normal neuronal function, leading to the characteristic cognitive and motor symptoms of Pick's disease.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the composition of Pick's body. While Pick's body does contain tau protein, it is not a Lewy body, which is a distinct type of inclusion body found in Parkinson's disease and other neurodegenerative disorders.
**Option B:** This option is incorrect because it suggests that Pick's body is a feature of Alzheimer's disease, which is a different neurodegenerative disorder characterized by the accumulation of amyloid beta plaques and tau tangles.
**Clinical Pearl / High-Yield Fact**
Pick's disease is often misdiagnosed as frontotemporal dementia or Alzheimer's disease, highlighting the importance of accurate histopathological diagnosis in distinguishing between these disorders.
**Correct Answer:** C. Pick's body is a type of tau inclusion body.