After developing mild jaundice, a teenage boy is found to have an alanine transaminase level eight times higher than the upper limit of normal.A low level of serum ceruloplasmin is subsequently found.There is no fever.This boy most likely has:

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Wilson disease is a defect of biliary copper excretion that leads to abnormal copper deposits in the liver and the basal ganglia of the brain.Some patients present initially with liver damage, and others with a central nervous system disorder.The copper-containing plasma protein ceruloplasmin is reduced, and copper appears in the urine.

After Developing Mild Jaundice, a Teenage Boy Is Found to Have