Which characteristic feature is seen in the kidney in Malignant hypertension –
**Core Concept**
Malignant hypertension is a severe and accelerated form of hypertension characterized by high blood pressure levels that can cause damage to organs such as the kidneys, heart, and brain. In the kidneys, malignant hypertension can lead to acute damage and failure due to the lack of blood flow and oxygen delivery.
**Why the Correct Answer is Right**
The characteristic feature of malignant hypertension in the kidney is the presence of **necrotizing arteriolitis**. This is a type of inflammation and damage to the arterioles, which are small blood vessels that supply blood to the kidneys. The high blood pressure causes the arterioles to become narrowed and inflamed, leading to a reduction in blood flow and oxygen delivery to the kidney tissue. This can result in the death of kidney cells and tissue, leading to acute kidney injury.
**Why Each Wrong Option is Incorrect**
**Option A:** Fibrosis is a feature of chronic kidney disease, not malignant hypertension.
**Option B:** Hemorrhage is not a characteristic feature of malignant hypertension in the kidney.
**Option C:** Edema is not a specific feature of malignant hypertension in the kidney.
**Clinical Pearl / High-Yield Fact**
Malignant hypertension can cause acute kidney injury due to the lack of blood flow and oxygen delivery to the kidneys. This can be life-threatening and requires prompt treatment with antihypertensive medications and supportive care.
**Correct Answer:** C.