Focal nodular hyperplasia


Young patients with incidental detection of hepatic lesions should generally be considered benign until proven otherwise. Hemangiomas are the most common benign lesions of the liver followed by focal nodular hyperplasias. They are typical with their arterial enhancement homogenizing in portal and equilibrium phases. The central scar shows delayed slow contrast uptake distinguishing it from the uncommon fibrolamellar hepatocellular carcinoma. The MRI obviates the need for histopathology when the T2 hyperintense nature of the scar is confirmed.