P-83 REDUCTION OF LIVER STIFFNESS AFTER ANTICOPPER THERAPY IN WILSON'S DISEASE

No Liver stiffness (LS) is increased in fibrosis related to chronic liver diseases. Nevertheless, other factors such as liver inflammation, congestion and intrahepatic deposits may also affect hepatic elasticity. We hypothesized that Wilson's disease (WD) intrahepatic copper accumulation can lead to an increase in LS. The aim of this study is to assess the changes in LS during treatment of patients with different presentations of WD. We included patients with confirmed diagnosis of WD (Leipzig score ≥4) under regular use of chelating agents or zinc salts, between 2014 and 2024. Patients who have undergone at least two transient hepatic elastography (THE; Fibroscan, ECHOSENS) during clinical follow-up, were included. The minimum interval between each elastography was one year. Patients submitted to liver transplantation were excluded. Variations in liver stiffness between the last and first THE, the anticopper therapy used, and the main WD manifestations, were evaluated. Thirteen patients were included: mean age of 28.8 ± 9.9 years; 54% female. Seven (54%) patients presented predominantly neurologic manifestation and six (46%) hepatic manifestations; 92% used chelating agents. The mean initial LS was 12.2 ± 14.8 kPa (median 7.5 kPa; ranging from 3.8 to 59.3), decreasing during treatment to 7.7 ± 4.6 kPa (median 6.3 kPa; ranging from 3.9 to 18.9) at a mean follow-up interval of 4.9 ± 2.8 years (ranging from 1 to 10) (p < 0.0001). Eight (61%) patients observed a median reduction of 2.3 kPa and five presented a median elevation of 0.3 kPa. There was no difference in LS variations according to clinical presentation of WD (p=0.387). In patients with WD, LS decreased in most patients during chelating therapy. Intrahepatic copper deposit might influence higher values of LS before anticopper therapy, suggesting the possibility of using THE to evaluate hepatic copper accumulation and to monitor WD treatment.