**Salt & Pepper Retinopathy**
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**Core Concept**
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Salt and pepper retinopathy is a condition characterized by a mottled appearance of the retina due to the presence of multiple small, scattered areas of retinal pigment epithelium (RPE) atrophy and hyperplasia. This condition is often associated with various systemic and ocular diseases.

**Why the Correct Answer is Right**
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The correct answer is not a cause of salt and pepper retinopathy. To understand why, we need to consider the pathophysiology of this condition. Salt and pepper retinopathy is typically caused by the deposition of abnormal protein aggregates, such as transthyretin (TTR) amyloid, in the RPE. Other causes include certain genetic disorders, such as familial amyloid polyneuropathy (FAP), and systemic diseases like multiple myeloma.

**Why Each Wrong Option is Incorrect**
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* **Option A:** This is a common cause of salt and pepper retinopathy, particularly in patients with FAP.
* **Option B:** This option is incorrect because it is actually a cause of salt and pepper retinopathy, often associated with systemic amyloidosis.
* **Option D:** This is not a recognized cause of salt and pepper retinopathy, making it a plausible distractor.

**Clinical Pearl / High-Yield Fact**
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Salt and pepper retinopathy can be a diagnostic clue for systemic diseases, such as amyloidosis, which requires a high index of suspicion and comprehensive evaluation.

**Correct Answer: D**