[Ectopic hepatocellular carcinoma. A case report].

Ectopic liver (EL) is a rare developmental anomaly caused by the migration of hepatic cells to other locations during embryogenesis. Its incidence is thought to be between 0.24 and 0.47% and can occur in various sites, although the gall bladder is the most frequent. Approximately 100 cases of EL have been published, of which 28 developed hepatocellular carcinoma, whilst the orthotopic liver was unaffected. All cases are reported in Asian and Caucasian patients. We report the case of a 42-year-old patient with a solid lesion measuring 17×12×12cm apparently arising from the posterior wall of the stomach, displacing various organs and suggestive of a gastrointestinal stromal tumour (GIST). The liver, biliary tract and other structures were unremarkable. Histopathology revealed a diagnosis of hepatocellular carcinoma in ectopic liver tissue.