Prenatal diagnosis of focal nodular hyperplasia of the liver.

A case of focal nodular hyperplasia of the liver presenting in a 36-week-old fetus is reported. The tumour appeared on antenatal ultrasound as a 4.0 cm x 3.0 cm x 2.7 cm hypoechoic mass at the periphery of the right lobe of the liver. Colour Doppler imaging showed it to have prominent vascularity. Postnatally, sonography confirmed the presence of a vascular mass within the liver. The tumour was removed at laparotomy and was diagnosed as an area of focal nodular hyperplasia on histopathological examination.