Since Wilson disease (WD) may not be present with evident clinical symptoms of liver injury and neurological presentation is rare in children, establishing a diagnosis is often challenging, especially in childhood. Increased transaminases can be the only abnormality found in early course of WD. In clinical practice, high suspicion is crucial for early diagnosis and timely treatment to ensure better outcomes. Conventional diagnostic criteria established for adults are commonly agreed for children but may not always be appropriate in very young age. Currently, the best therapeutic approach for each specific presentation of the disease remains controversial and there are no clear indications about how to treat pediatric WD patients with a mild liver disease.