Figure 8a. Large, pedunculated FNH in a 38-year-old woman with a palpable mass. The patient had no history of oral contraception. (a) Baseline US image shows a homogeneous, well-defined mass (arrows) depending from the right hepatic lobe. (b) Arterial phase US image obtained 22 seconds after contrast material injection demonstrates multiple radiating arteries within the mass (arrows). (c) Portal phase US image obtained 56 seconds after injection demonstrates marked enhancement of the mass (white arrows), with a hypoechoic central scar (black arrow). (d) Late arterial phase CT scan shows a markedly enhancing mass (white arrows) with central scarring (black arrow) (cf c).