Brush fire appearance of fundus is seen in –
**Core Concept**
The brush fire appearance of the fundus is a characteristic retinal finding associated with a specific condition. It is characterized by a pattern of retinal hemorrhages and microaneurysms that resemble a brush fire. This appearance is due to the leakage of fluid from damaged retinal capillaries.
**Why the Correct Answer is Right**
The correct answer is related to diabetic retinopathy, a microvascular complication of diabetes mellitus. In diabetic retinopathy, the high blood sugar levels damage the blood vessels in the retina, leading to their leakage and the formation of microaneurysms. The resulting hemorrhages and microaneurysms create the characteristic brush fire appearance on fundus examination. This is due to the weakening of the blood-retinal barrier and the accumulation of fluid in the retinal layers.
**Why Each Wrong Option is Incorrect**
* **Option A:** While hypertension can cause retinal changes, such as hypertensive retinopathy, it does not typically cause a brush fire appearance.
* **Option B:** Central serous chorioretinopathy can cause a "smoke stack" appearance, but not a brush fire appearance.
* **Option C:** Age-related macular degeneration can cause retinal changes, but it is not typically associated with a brush fire appearance.
**Clinical Pearl / High-Yield Fact**
Diabetic retinopathy is a leading cause of blindness worldwide, and early detection is crucial for preventing vision loss. The brush fire appearance of the fundus is a key finding in diabetic retinopathy, and its identification can guide the diagnosis and management of this condition.
**Correct Answer: D. Diabetic retinopathy.**