A rare tumor of the lung, hepatoid adenocarcinoma

Hepatoid adenocarcinoma is a rare neoplasm,1 named for its histopathological and immunohistochemical similarity with the hepatocellular carcinoma. The extrahepatic localization has a poor prognosis and tends to occur more frequently in the stomach. An important characteristic is the ability to produce alpha-fetoprotein, like many other pulmonary neoplasms. Its ability to respond to treatment and the possibility of recurrence is another relevant characteristic.2,3