fnh is the second most common solid tumor of the liver, surpassed in prevalence only by hepatic hemangioma.
in cases of fnh ultrasound findings are variable. the lesion may appear as a homogeneous mass that is isoechoic, hypoechoic, or hyperechoic. fnh has a mass effect that may displace intrahepatic blood vessels. in only 18% of cases is a central scar (hypoechoic centre) present.they look very similar to a liver haemangioma.
they are related to an area of vascular malformation. it is more common in women than men.
they are generally less than 5cm. contrast can help define the lesion.