Question

A 13-year-old boy presents with jaundice, fatigue, muscle stiffness, tremors, behavioral changes, hepatosplenomegaly, and Kayser-Fleischer rings. Which test is definitive for the diagnosis?

• A. Urinary copper
• B. Serum ceruloplasmin
• C. Hepatic parenchymal copper concentration
• D. Genetic testing for ATP7B mutation

Hint:

For diagnosing Wilson's disease, serum ceruloplasmin levels are a key marker to confirm the diagnosis. This condition also presents with neurologic symptoms and hepatic enlargement.

Answer 1

The Correct Option is B

This clinical scenario describes a 13-year-old boy with symptoms suggestive of Wilson's disease, a genetic disorder causing copper accumulation in the body. Symptoms include jaundice, fatigue, tremors, behavioral changes, hepatosplenomegaly, and Kayser-Fleischer rings. To confirm Wilson's disease, testing copper metabolism and related markers is critical. 

Among the diagnostic tests listed, Serum ceruloplasmin is the most relevant choice. Ceruloplasmin is a copper-carrying protein, and levels are typically low in Wilson's disease—making it a valuable indicator for diagnosis.

Here's a breakdown of the other options:

• Urinary copper: Elevated in Wilson's disease but not definitive alone.
• Hepatic parenchymal copper concentration: It provides a direct measure of copper overload and is very accurate but more invasive.
• Genetic testing for ATP7B mutation: Confirms genetic cause but may not be conclusive if symptoms are absent.

 

Thus, measuring serum ceruloplasmin offers a straightforward and non-invasive approach to support the diagnosis of Wilson's disease based on the described symptoms.