Contrast-enhanced ultrasound in the diagnosis of nodules in liver cirrhosis

Figure 4 A 69-year-old man with well-differentiated hypovascular hepatocellular carcinoma. A: Gray-scale ultrasound shows an exophytic hypoechoic mass in the liver; B: The mass (arrows) is hypoechoic relative to the adjacent liver in the arterial phase of contrast-enhanced ultrasound; C: The mass (arrows) is isoechoic to the liver in the portal venous phase. Biopsy revealed well-differentiated hepatocellular carcinoma.