Abstract
Although a reduced serum zinc level is often observed in patients with chronic liver disease due to hepatitis virus, its prognostic importance has not been adequately investigated. This study aimed to elucidate the association of zinc deficiency with prognosis, especially in early hepatocellular carcinoma (HCC) patients. From 2005 to 2018, 466 patients with naïve HCC due to hepatitis virus were enrolled (327 men, 139 women; median age 70years; hepatitisC virus [HCV] n= 389, hepatitisB virus [HBV] n= 69, hepatitisC virus and hepatitisB virus n= 8; Child-PughA n= 367, Child-PughB n= 82; Child-PughC n= 17; TNM-LCSGJ stageI n= 150, stageII n= 181, stageIII n= 91, stageIVa n= 26, stateIVb n= 18). Of the 466 patients, 287 were within the Milan criteria (early HCC) and treated curatively. Zinc deficiency was defined as <60μg/dL. Clinical records and prognostic factors were retrospectively evaluated. The levels of serum zinc became lower with chronic liver disease progression (Child-PughA, B, C: 64.3 ± 14.3, 52.3 ± 15.7, 48.4 ± 13.5μg/dL, respectively; P< 0.001). In early HCC patients treated curatively, overall survival and recurrence rates were better in patients treated curatively and without zinc deficiency as compared with patients with zinc deficiency (3-year overall survival 86.5% vs. 77.2%, 5-year overall survival 73.5% vs. 43.8%, P< 0.001; 3-year recurrence 44.8% vs. 58.3%, 5-year recurrence 56.8% vs. 77.5%, P= 0.002). Not only infection control of hepatitis virus (sustained virological response in HCV or nucleos(t)ide analogs in HBV; HR 0.078, P< 0.001), but also zinc deficiency (HR 1.773, P= 0.041) were significant prognostic factors for death. Serum levels of zinc were reduced in association with chronic liver disease grade progression. In addition to infection control of hepatitis virus, zinc deficiency might be a significant prognostic factor for survival in patients with early HCC due to viral hepatitis treated curatively.
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