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Mumoli's sign (also known as a "Playboy Rabbit" sign) is a radiologic sign seen in the normal liver.It appears as a rabbit-shaped image caused by the confluence of the middle and right hepatic veins as they merge with the inferior vena cava.
The right hepatic vein is the longest and largest of all the hepatic veins. It drains the liver segments VI and VII in their entirety, and variably participates in the drainage of segments V and VIII; the extent of drainage of the latter two segments by the right hepatic veins as opposed to the middle hepatic vein and possible variant accessory veins determines the calibre of the right hepatic ...
It may receive its supply from both the right and the left branches of portal vein. It contains one or more hepatic veins which drain directly into the inferior vena cava (IVC). [1] The caudate lobe is a separate structure which receives blood flow from both the right- and left-sided vascular branches. [5] [6]
Contrast tumor enhancement is observed on the left during arterial phase. The “wash-out” phenomenon can be seen on the right, during portal venous phase. [citation needed] HCC appearance on 2D ultrasound is that of a solid tumor, with imprecise delineation, with heterogeneous structure, uni- or multilocular (encephaloid form).
Increased pressure in the sublobular branches of the hepatic veins causes an engorgement of venous blood, and is most frequently due to chronic cardiac lesions, especially those affecting the right heart (e.g., right-sided heart failure), the blood being dammed back in the inferior vena cava and hepatic veins. Central regions of the hepatic ...
Portal vein thrombosis on computed tomography (left) and cavernous transformation of the portal vein after 1 year (right) The diagnosis of portal vein thrombosis is usually made with imaging confirming a clot in the portal vein; ultrasound is the least invasive method and the addition of Doppler technique shows a filling defect in blood flow.
Ultrasound investigation is often done before attempts to remove fluid from the abdomen. This may reveal the size and shape of the abdominal organs, and Doppler studies may show the direction of flow in the portal vein, as well as detecting Budd–Chiari syndrome (thrombosis of the hepatic vein) and portal vein thrombosis. The sonographer also ...
The central vein joins to the hepatic vein to carry blood out from the liver. A distinctive component of a lobule is the portal triad, which can be found running along each of the lobule's corners. The portal triad consists of the hepatic artery, the portal vein, and the common bile duct. [25]