Hepatic tumorigenesis in acute hepatic failure.

We report on a 59-year-old woman and a 31-year-old man with no previous medical history of liver disease presenting with acute liver failure probably caused by drug toxicity. High urgency liver transplantation was performed 30 and 51 days after the onset of symptoms, respectively. Histomorphological evaluation of the explanted livers revealed incidental dysplastic nodules and hepatocellular carcinoma of up to 8 mm in diameter. Up to now only a few cases of metastatic liver disease and even fewer cases of primary liver cancer presenting as acute liver failure have been described. Our cases indicate hepatic tumorigenesis not as a cause of hepatic failure but either as an event taking place in parallel or as a process being induced by progressive liver failure.