Acute liver injury in a non-alcoholic fatty liver disease patient with chloroform exposure: a case report

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Abstract
We report a rare case of acute liver injury by daily exposure to small amounts of chloroform in non-alcoholic fatty liver disease (NAFLD) patient. The patient had been followed up in our hospital every 3 months. Although his alanine aminotransferase (ALT) levels were steady around 30 ~ 60 U/L until August 2014, ALT level was spontaneously increased to more than 1,000 U/L at the follow-up point in late August 2014. As he was diagnosed as acute liver injury by chloroform exposure, we withdrew him from the exposure of chloroform and treated him with 600 mg/day of ursodeoxycholic acid. Afterwards, his ALT level rapidly improved and normalized within 1 month. To verify the influences of chloroform exposure, we measured plasma chloroform levels by gas chromatography. Although plasma chloroform concentration was 7.1 ng/ml (normal range: < 0.2 ng/ml) at the time of liver injury, the concentration had decreased to 0.7 ng/ml by 1 month later. Despite the fact that he had put on a face mask to protect from aspiration of chloroform, liver injury still occurred in the present case. Chloroform has a high solubility for lipids and accumulation of lipids in the liver might become a risk factor for liver injury by chloroform.

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