Kayser Fleischer ring is seen in: March 2013 (a, d, e, g)
**Core Concept**
Kayser-Fleischer rings are a clinical sign characterized by brownish or golden discoloration of the peripheral cornea, typically caused by the deposition of copper in the Descemet's membrane. This condition is a manifestation of systemic copper accumulation, often associated with liver diseases or genetic disorders.
**Why the Correct Answer is Right**
The correct answer is related to the accumulation of copper in the body, which leads to the deposition of copper in the Descemet's membrane of the cornea. This is a result of the impaired excretion of copper due to liver dysfunction or other underlying conditions. The liver plays a crucial role in copper metabolism, and its dysfunction can lead to the accumulation of copper in the body, ultimately resulting in Kayser-Fleischer rings.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because Wilson's disease is a genetic disorder that affects copper metabolism, leading to excessive copper accumulation in the body, which can cause Kayser-Fleischer rings.
**Option B:** Incorrect because Hepatitis B is a viral infection that primarily affects the liver, but it is not directly associated with Kayser-Fleischer rings.
**Option C:** Incorrect because Hemochromatosis is a genetic disorder that leads to excessive iron accumulation in the body, not copper.
**Option D:** Incorrect because Primary Biliary Cirrhosis is a chronic liver disease that can lead to liver failure, but it is not directly associated with Kayser-Fleischer rings.
**Clinical Pearl / High-Yield Fact**
Kayser-Fleischer rings are a critical diagnostic feature of Wilson's disease, a genetic disorder that requires prompt identification and management to prevent serious complications.
**Correct Answer: A. Wilson's disease.**