[Focal nodular hyperplasia: characterization with Doppler ultrasonography]

Focal nodular hyperplasia (FNH) is an hepatic pseudotumoral lesion which is usually detected accidentally in subjects of any age. Definitive diagnosis requires histologic study, prior to analysis with imaging techniques. Three casos of FHN are presented characterized with Doppler ultrasonography in whom high frequency and low resistance central pulse flow were observed in contrast with the findings obtained in other benign hepatic lesions.