Wilson's disease: a diagnosis made in two individuals greater than 40 years of age.

Wilson's disease is an autosomal recessive disease of copper metabolism which is widely recognized as a disease occurring clinically in children, adolescents, and young adults. Unrecognized and therefore untreated Wilson's disease in patients over age 40 is thought to occur either rarely or not at all. Two cases of Wilson's disease presenting at an age greater than 40 years are presented. The first is a 42-year-old Israeli women who presented with fulminant hepatic failure. The serologic and biochemical investigations obtained at the time of her fulminant hepatic failure included copper studies which suggested the diagnosis of Wilson's disease, which was confirmed by an examination of the native liver following successful orthotopic liver transplantation. The second case is that of a 56-year-old white male who presented to the hospital with a three-year history of neurological dysfunction, pancytopenia, and mild splenomegaly. A battery of serologic and biochemical investigations suggested a diagnosis of Wilson's disease. The diagnosis was confirmed by quantitative hepatic copper estimation and the demonstration of Wilson's disease in three of his siblings, all of whom were diagnosed after the proband case had been identified. This man and his siblings have been treated with d-penicillamine, with remarkable improvement in their neurologic and hepatic function. The proband is currently well 11 years after his diagnosis was established. These two cases demonstrate that a diagnosis of Wilson's disease should be considered as part of the differential diagnosis of individuals in the fourth and fifth decades of life who present with unexplained liver disease.