Fig. 4From: Differential diagnosis between hepatic alveolar echinococcosis and intrahepatic cholangiocarcinoma with conventional ultrasound and contrast-enhanced ultrasoundIntrahepatic cholangiocarcinoma (ICC). a Baseline ultrasound image shows a nodule with hypoechogenicity without macrocalcifications in the right lobe of the liver that is 8.7 cm in diameter. b In arterial phase on CEUS, the tumor appeared as irregular rim enhancement. c - d In portal and late phase, it faded out rapidly and showed marked washoutBack to article page