[Late-onset Wilsońs disease].

A 58-year old male with a past history of psychiatric disorders was studied for a persistent serum transaminase increase. Low serum ceruloplasmin level (lower than 3 mg/dL), increased urinary copper excretion, and increased liver tissue copper concentration (1050 mcg/g dry weight) confirmed the diagnosis of Wilsońs disease. Slit lamp examination did not show Kayser-Fleischer rings. D-penicilamin therapy was followed by serum transaminase normalization. Similar late-onset cases of Wilsońs disease are exceptional, but confirm the clinical heterogeneity of the disease.