**Question:** A 32 year old patient with history of recurrent headache was sent for fundus evaluation. He was found to be having generalized aerial attenuation with multiple cotton wool spots and flame shaped haemorrhages in both eyes. The most likely cause is:

A. Migraine
B. Hypertension
C. Diabetic retinopathy
D. Sickle cell anemia

**Core Concept:**

The clinical scenario described involves a patient with a history of recurrent headache, abnormal fundus findings, and possible causes related to hypertension, migraine, diabetic retinopathy, and sickle cell anemia. Understanding the core concepts of these diseases and their common fundus findings is essential for accurate diagnosis.

**Why the Correct Answer is Right:**

The correct answer is **D** - Sickle cell anemia. The fundus findings described, including generalized aerial attenuation, cotton wool spots, and flame shaped haemorrhages, are characteristic of sickle cell retinopathy. These changes occur due to the occlusion of retinal vessels by sickle red blood cells, leading to ischemia and subsequent hemorrhages and cotton wool spots.

**Why Each Wrong Option is Incorrect:**

A. Migraine: Although migraines can cause headache, their fundus findings are typically not as severe as described in this scenario. Migraine-related fundus changes are usually focal, unilateral, and less severe.

B. Hypertension: Hypertensive retinopathy predominantly presents with arterial narrowing, exudates, and microaneurysms, not the severe retinal changes seen in this scenario.

C. Diabetic retinopathy: Diabetic retinopathy usually presents with non-specific retinopathy, including microaneurysms, hemorrhages, and exudates, not the severe retinal changes described in this scenario.

**Clinical Pearl:**

In patients with a history of recurrent headache and severe retinal findings, it is crucial to consider sickle cell anemia as a potential diagnosis, especially in populations with high prevalence of this condition. Early recognition and management can prevent severe vision loss and other complications associated with sickle cell retinopathy.