CP and Wilson disease: Measurement of copper metabolism further confirmed the diagnosis of WD; lower levels of serum ceruloplasmin (0.02 g/L, normal range: 0.27–0.47 g/L) and increased urinary excretion of copper (260.4 μg/day, normal range: 10–60 g/day) were detected, although normal copper serum levels (12.52 μmol/L, normal range: 7.12–21.29 μmol/L) were also observed.