[Oppositional behavior in a 14-year-old boy as a first clinical symptom of Wilson's disease]

A 14-year-old boy was referred to the child and adolescent psychiatry department due to an increase in oppositional behavior. The psychiatric history revealed that he was also suffering from dysarthria, excessive salivation and a decline in academic performance. Extensive diagnostic testing led to the diagnosis of Wilson's disease. The timely administration of appropriate treatment necessitates early recognition of the psychiatric symptoms associated with Wilson's disease.