Contrast-enhanced ultrasonography in the evaluation of incidental focal liver lesions: A cost-effectiveness analysis

Figure 1 Liver metastasis of spinocellular carcinoma. Male, 75 years of age, with history of spinocellular carcinoma of the left lung. Emergency ultrasound performed for colicky abdominal pain identifies a hypoechoic lesion in segment S8 of the right liver lobe (A); Upon contrast-enhanced ultrasonography (CEUS) examination, the lesion shows increased enhancement in arterial phase compared to surrounding parenchyma (B); In following phases (C), there is detectable washout typical for malignant lesions. On CT performed for another reason there is a hypodense lesion on portal venous phase (D) corresponding to metastasis.