**Question:** A 56-year-old man presents with a change in skin color, fatigue, and abdominal pain. He has also noticed increased urine output and thirst. On examination, his skin appears bronze in color, his liver span is 16 cm, and there is loss of body hair, and testicular atrophy. His ferritin is 600 ng/mL (15-200 ng/mL), aspartate amino transaminase (AST) 130 U/L (8-20 U/L), alanine amino transaminase (ALT) 150 U/L (8-20 U/L), and total bilirubin 0.5mg/dL (0.1-1 mg/dL). Coagulation tests and albumin level are normal but the random glucose is elevated at 250 mg/dL. Which of the following is the most likely diagnosis?

A. Wilson's disease
B. Pernicious anemia
C. Hemochromatosis
D. Cirrhosis

**Correct Answer:**

**Core Concept:**

Wilson's disease is a genetic disorder characterized by copper accumulation in the liver and brain due to impaired copper excretion. The clinical presentation often includes abnormal liver function tests (elevated AST, ALT, and total bilirubin), neurological symptoms, and skin pigmentation (Kayser-Fleischer rings).

**Why the Correct Answer is Wilson's Disease:**

The patient presents with several key symptoms and laboratory findings that support the diagnosis of Wilson's disease:

1. Elevated liver enzymes (AST, ALT, and total bilirubin): These elevated enzymes are indicative of liver dysfunction and copper accumulation.
2. Skin pigmentation (Kayser-Fleischer rings): These are characteristic and confirm the diagnosis.
3. Copper levels (normal): This is expected in Wilson's disease as the liver is unable to excrete copper effectively due to the genetic defect.

**Why Other Options are Incorrect:**

A) Pernicious anemia: While anemia is a common manifestation of Wilson's disease, the neurological symptoms and elevated liver enzymes are more consistent with Wilson's disease. Pernicious anemia would present with macrocytic anemia, normal liver enzymes, and gastrointestinal symptoms (e.g., vomiting, melena, and abdominal pain).

B) Cirrhosis: Wilson's disease is distinct from cirrhosis. Cirrhosis is a result of chronic liver disease with fibrosis and scarring, while Wilson's disease primarily affects the liver and brain. Additionally, Wilson's disease has characteristic skin pigmentation and neurological symptoms, while cirrhosis often presents without these features.

C) Hemochromatosis: Hemochromatosis (iron overload) and Wilson's disease (copper overload) are separate conditions. Wilson's disease is characterized by copper accumulation in the liver and brain, while hemochromatosis involves iron overload. The elevated liver enzymes and neurological symptoms in Wilson's disease further differentiate it from hemochromatosis.

D) Cirrhosis