What is the histological appearance of brain in Creutzfeldt-Jakob disease –
**Core Concept**
Creutzfeldt-Jakob disease (CJD) is a rare, degenerative, and fatal brain disorder caused by an abnormally folded protein called a prion. The disease leads to progressive brain damage, resulting in symptoms such as dementia, memory loss, and loss of coordination.
**Why the Correct Answer is Right**
In CJD, the histological appearance of the brain is characterized by the presence of spongiform changes, which are due to the accumulation of prion proteins within the brain cells. This leads to the formation of small holes or vacuoles in the brain tissue, giving it a sponge-like appearance. The prion proteins also cause the degeneration of neurons, resulting in a loss of brain cells and the formation of gliosis, which is the proliferation of astrocytes in response to brain injury.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not accurately describe the histological appearance of the brain in CJD. Spongiform changes are a hallmark of the disease, but they are not the only feature.
* **Option B:** This option is incorrect because it is not specific to CJD. Other neurodegenerative diseases, such as Alzheimer's disease, can also cause neuronal loss and gliosis.
* **Option C:** This option is incorrect because it is not a characteristic feature of CJD. Hemorrhage is not typically associated with this disease.
**Clinical Pearl / High-Yield Fact**
CJD is a rare but fatal disease, and its diagnosis is often challenging. The presence of spongiform changes in the brain is a key feature of the disease, and it can be confirmed through histological examination of brain tissue.
**Correct Answer:** C.