Hepatic iron and zinc concentrations after portacaval shunting for nonalcoholic cirrhosis

Authors

  • Dr. Paul C. Adams,

    Corresponding author
    1. Departments of Medicine, University Hospital, University of Western Ontario, London, Ontario, Canada N6A 5A5
    • Department of Medicine, University Hospital, P.O. Box 5339, London, Ontario, Canada N6A 5A5
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  • Colin Bradley,

    1. Departments of Clinical Biochemistry, University Hospital, University of Western Ontario, London, Ontario, Canada N6A 5A5
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  • Jaroslav V. Frei

    1. Departments of Pathology, University Hospital, University of Western Ontario, London, Ontario, Canada N6A 5A5
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Abstract

Hepatic iron and zinc concentrations were determined in 26 consecutive nonalcoholic cirrhotic patients who had previously undergone portacaval shunting and then liver transplantation and 37 control patients. Stainable iron was graded on a scale of 0 to 4; 11 shunt patients and 3 control patients had grade 2 to 4 iron staining. Mean hepatic iron concentration was significantly increased (20.1 ± 4.1 μmol/gm) in the shunt group compared with the control group (9.1 ± 2.3 μmol/gm) (normal value, < 35 μmol/gm) (p = 0.015, Student's t test). Mean hepatic iron index (hepatic iron/age) was 0.5 ± 0.10 in the shunt group and 0.19 ± 0.04 in the control group (p = 0.002). One shunt patient had a hepatic iron index of greater than 2. Hepatic zinc was not significantly different between the shunt group (2.42 ± 0.18 μmol/gm) and the control group (2.56 ± 0.14 μmol/gm). Serial biopsy specimens were analyzed in 17 cases (6 shunt, 11 controls), and the mean annual rate of iron accumulation was significantly greater in shunt patients (4.75 μmol/gm/yr) than in control cases (0.93 μmol/gm/yr, p = 0.037). Although increased stainable iron was ccmmon after portacaval shunting, quantitative iron analysis demonstrated increased hepatic iron concentrations in only 6 of 26 shunt patients and 3 of 37 control patients (p = 0.14, x2 test). Quantitative hepatic iron analysis demonstrated in this study that portacaval shunt patients have far less accumulated iron than hemochromatosis patients and are unlikely to have tissue injury resulting from iron overload. (Hepatology 1994;19:101-105).

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