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Pseudolesion in segment IV of the liver adjacent to the falciform ligament caused by drainage of the paraumbilical vein: demonstration by power Doppler ultrasound

Department of Radiology, Kanazawa University School of Medicine, 13-1, Takara-machi, Kanazawa, 920-8641, Japan

View larger version (100K): [in a new window]   Figure 1. Contrast enhanced CT shows a rounded area of hypoattenuation in the anteromedial edge of segment IV of the liver, adjacent to the falciform ligament.

View larger version (108K): [in a new window]   Figure 2. CT during arterial portography shows a rounded portal perfusion defect at the anteromedial edge of segment IV of the liver, adjacent to the falciform ligament.

View larger version (109K): [in a new window]   Figure 3. CT obtained during common hepatic arteriography (CTHA) shows hypoattenuation at the anteromedial edge of segment IV of the liver, adjacent to the falciform ligament. Because of the irregular perfusion of contrast medium, the liver shows irregular non-tumorous stain on CTHA.

View larger version (84K): [in a new window]   Figure 4. (a) Power Doppler image shows a vessel connecting the hepatic parenchyma at the anteromedial edge of segment IV of the liver, adjacent to the falciform ligament, and extrahepatic soft tissue of the abdominal wall (arrow). (b) The vessel observed in (a) is directly connected to the vessels in the hepatic parenchyma on the anteromedial edge of segment IV of the liver, adjacent to the falciform ligament (arrow), and is shown in the extrahepaticsoft tissue of the abdominal wall (arrowhead).