fig4

Figure 4. Peripheral Arterial Phase Hyperenhancement. Axial T1-weighted fat saturated MR images of the abdomen prior to (A), and during the arterial phase (B) and delayed phase (C) of dynamic post extracellular contrast images. The 26 mm observation in the right hepatic lobe demonstrates peripheral arterial phase hyperenhancement (white arrow). This feature does not qualify as the major feature of nonrim arterial phase hyperenhancement and should lead the radiologist to assign the category of LR-M (probably or definitely malignancy, but not HCC specific). HCC: hepatocellular carcinoma