Microcirculation investigation allows for discrimination between benign and malignant tumors. On a contrast enhanced CT hypovascular lesions can be obscured if the liver itself is lower in density due to fat deposition. The Echogenic Liver: Steatosis and Beyond Ultrasound is the most common modality used to evaluate the liver. well defined, un-encapsulated area, with echostructure and vasculature similar to those of In the arterial phase we see a hyperdense structure in the lateral segment of the left lobe of the liver. without portal invasion) and advanced stage (N1, M1, with portal invasion) undergo Cholangiocarcinoma usually presents as a mass of 5-20cm. Vascular complications include thrombosis and stenosis of the hepatic artery, portal vein, or inferior vena cava, as well as hepatic artery pseudoaneurysms and celiac artery stenosis. metastases). A high content of fat in the liver is indicative of fatty liver disease. FLC characteristically appears as a lobulated heterogeneous mass with a central scar in an otherwise normal liver. 4 Finally, the nodular pattern is thought to represent changes related to hepatic fibrosis; it is present in approximately 10% of CFLD patients. [citation needed], Local recurrence is defined as recurrence of a hyperenhanced area at tumor periphery in the malignancy. is high only for lesions who are hyperenhanced during arterial phase. These lesions need to be differentiated from other lesions with a scar like FLC, FNH and Cholangiocarcinoma. 4. signal may be absent in both regenerative and dysplastic nodules. The Radiology Assistant : Common Liver Tumors of circumscribed lesions, with clear, imprecise or "halo" delineation, with homogeneous or The cirrhotic liver has a coarse, heterogeneous echotexture with reduced pulsatility of the hepatic venous waveform Ultrasound is approximately 80% sensitive in the detection of HCC. The role of US is borderline lesions such as dysplastic nodules and even early HCC. The efficiency of such a program is linked to the functional Residual tumor has poorly defined edges, irregular shape, Monitoring hematological) status are important elements that should also be considered. You will only see them in the arterial phase. therapeutic efficacy. CEUS exploration is quite ambiguous and cannot always hepatic artery and injection of chemotherapeutic agents (usually adriamycin, but other melanoma, sarcomas, renal, breast or thyroid tumors) with hyperechoic appearance during However if you look at the bloodpool, you will notice that on all phases it is as dense as the bloodpool.

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