fig4

Figure 4. A: US shows a hypoechoic nodule; B: portal phase (32 s): arterial phase (23 s) shows a homogeneous isoenhancement of the lesion; C: portal phase (52 s): the nodule is isoechoic with respect to the surrounding liver; D: late portal phase (280 s): the hepatocellular carcinoma (HCC) is isoechoic with respect to the surrounding liver