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A case of erythropoietic protoporphyria with liver cirrhosis suggesting a therapeutic value of supplementation with alpha-tocopherol.
Erythropoietic protoporphyria (EPP) was diagnosed in a 27-year-old man based on a typical clinical history, and a marked increase in erythrocyte and fecal protoporphyrin concentrations. Although liver disease is not a common feature in EPP, he had slight liver dysfunction. A percutaneous liver biopsy was performed and it showed minimal hepatocellular damage and many reddish brown pigment deposits in hepatocytes, Kupffer cells, portal histiocytes, bile canaliculi and small biliary radicles. Electron microscopic findings confirmed that these deposits were composed of protoporphyrin crystals. Liver biochemistry remained well for >2 years, but deteriorated rapidly and second liver biopsy obtained 28 months after the first biopsy revealed the development of liver cirrhosis. We treated the patient with intravenous administration of dl-a-tocopherol acetate (vitamin E; 500 IU/body/day). Following the administration of vitamin E, the concentration of protoporphyrin in erythrocytes decreased significantly and the liver function tests were improved. Sixteen weeks later he showed the full clinical and biochemical recovery suggesting that vitamin E supplementation might be useful in treating patients with EPP who developed liver damage.
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