Prenatally detected hepatic hamartoma: another cause of non-immune hydrops.

Although various conditions associated with non-immune hydrops have been reported, primary hepatic tumours are rare. As a mesenchymal hamartoma of the liver is a rare benign tumour, it has not been listed as a cause of hydrops. In this report we describe a case in which a large cystic mass in the fetal liver associated with non-immune hydrops was prenatally detected with sonography and magnetic resonance imaging, and histopathologically confirmed as a mesenchymal hamartoma of the liver.