Transient spontaneous regression of hepatocellular carcinoma

We report on 2 patients with liver cirrhosis and biopsy-proven hepatocellul ar carcinoma who underwent spontaneous regression. In 1 case the tumor beca me undetectable at ultrasonography, while, in the other, the liver lesions decreased in size and showed inner calcifications. In both patients, a-feto protein, which was high at first diagnosis, returned to normal values. Afte r a tumor-free period of 4 years and 17 months, respectively, liver cancer reappeared and patients died from complications. We advance the hypothesis that tumor regression, when it occurs in cirrhotic patients, is always tran sient, with chronic liver disease being the oncogenic triggering factor.