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Research Article

Hepatotoxicity in Acute Iron Poisoning

Pages 721-726 | Published online: 31 Dec 2001
 

Abstract

Although hepatotoxicity is a known sequela of acute iron poisoning, the literature describing it is confined to sporadic reports. Key issues such as prognosis and whether this is a dose-related phenomenon are not addressed. Review of this literature and of experimental animal studies demonstrates that it occurs early in the clinical course and has a relatively high mortality. The lowest acute serum iron concentration associated with hepatotoxicity was 1700 μg/dL (304 μmol/L). Since this greatly exceeds the reference range of 50–150 μg/dL (9–27 μmol/L), it supports a dose-related etiology. Unlike most other hepatotoxins, the periportal areas of the hepatic lobule are the primary sites of injury. As this is the principle site for hepatic regeneration, this accounts for the relatively high mortality rate. An understanding of the pathogenesis of the hepatotoxicity of acute iron poisoning is central to the identification of rational and effective interventions. From the clinical perspective, the relatively high mortality rate of iron poisoning-induced hepatotoxicity requires vigilance for its onset and earlier consideration of liver transplantation.

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