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Exophytic benign and malignant hepatic tumors: CT imaging features.

Kim HJ, Lee DH, Lim JW, Ko YT, Kim KW - Korean J Radiol (2008 Jan-Feb)

Bottom Line: The beak sign and the feeding artery of a tumor are useful diagnostic indicators of exophytic hepatic tumors.Two- or three-dimensional reformation images are also helpful for diagnosis.The CT features of exophytic hepatic tumors are similar to those of the usual intrahepatic tumors except for their location.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Kyung Hee University Medical Center, Dongdaemun-Gu, Seoul, Korea. radhjkim@khu.ac.kr

ABSTRACT
Our objective is to describe the CT features of exophytic hepatic tumors those may pose a diagnostic challenge because of the uncertainty of tumor origin. The beak sign and the feeding artery of a tumor are useful diagnostic indicators of exophytic hepatic tumors. Two- or three-dimensional reformation images are also helpful for diagnosis. The CT features of exophytic hepatic tumors are similar to those of the usual intrahepatic tumors except for their location.

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A 52-year-old woman with an exophytic angiomyolipoma.A. A contrast-enhanced CT scan during hepatic arterial phase shows a fatty mass in the lateral segment of the liver. This fatty mass shows the beak sign (arrow) in its contact surface with the lateral segment. The left hepatic artery (arrowhead) is enlarged and it is a prominent feeding artery supplying this fatty mass.B. On a contrast-enhanced CT scan during portal venous phase, 4 cm below (A), most of the huge fatty mass (arrows) is located in the peritoneal cavity.C. Hepatic arteriography shows a dilated left hepatic artery (arrow) and prominent tumor vessels.
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Figure 7: A 52-year-old woman with an exophytic angiomyolipoma.A. A contrast-enhanced CT scan during hepatic arterial phase shows a fatty mass in the lateral segment of the liver. This fatty mass shows the beak sign (arrow) in its contact surface with the lateral segment. The left hepatic artery (arrowhead) is enlarged and it is a prominent feeding artery supplying this fatty mass.B. On a contrast-enhanced CT scan during portal venous phase, 4 cm below (A), most of the huge fatty mass (arrows) is located in the peritoneal cavity.C. Hepatic arteriography shows a dilated left hepatic artery (arrow) and prominent tumor vessels.

Mentions: Hepatic angiomyolipomas are usually solitary and predominantly seen in women. Histologically, they are composed of smooth muscle, fat, and vessels in various combinations. As far as we know, there is only one report describing a pedunculated or exophytic angiomyolipoma arising from the liver (11). Angiographically, angiomyolipomas are hypervascular and they may show aneurysms (12). Angiomyolipomas can have various CT appearances because of the variable fatty component that ranges between 5% and 90% (13). Identification of the feeding artery arising from the liver and the fatty component of the mass on CT may provide clues for the diagnosis of an exophytic angiomyolipoma (Fig. 7).


Exophytic benign and malignant hepatic tumors: CT imaging features.

Kim HJ, Lee DH, Lim JW, Ko YT, Kim KW - Korean J Radiol (2008 Jan-Feb)

A 52-year-old woman with an exophytic angiomyolipoma.A. A contrast-enhanced CT scan during hepatic arterial phase shows a fatty mass in the lateral segment of the liver. This fatty mass shows the beak sign (arrow) in its contact surface with the lateral segment. The left hepatic artery (arrowhead) is enlarged and it is a prominent feeding artery supplying this fatty mass.B. On a contrast-enhanced CT scan during portal venous phase, 4 cm below (A), most of the huge fatty mass (arrows) is located in the peritoneal cavity.C. Hepatic arteriography shows a dilated left hepatic artery (arrow) and prominent tumor vessels.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2627168&req=5

Figure 7: A 52-year-old woman with an exophytic angiomyolipoma.A. A contrast-enhanced CT scan during hepatic arterial phase shows a fatty mass in the lateral segment of the liver. This fatty mass shows the beak sign (arrow) in its contact surface with the lateral segment. The left hepatic artery (arrowhead) is enlarged and it is a prominent feeding artery supplying this fatty mass.B. On a contrast-enhanced CT scan during portal venous phase, 4 cm below (A), most of the huge fatty mass (arrows) is located in the peritoneal cavity.C. Hepatic arteriography shows a dilated left hepatic artery (arrow) and prominent tumor vessels.
Mentions: Hepatic angiomyolipomas are usually solitary and predominantly seen in women. Histologically, they are composed of smooth muscle, fat, and vessels in various combinations. As far as we know, there is only one report describing a pedunculated or exophytic angiomyolipoma arising from the liver (11). Angiographically, angiomyolipomas are hypervascular and they may show aneurysms (12). Angiomyolipomas can have various CT appearances because of the variable fatty component that ranges between 5% and 90% (13). Identification of the feeding artery arising from the liver and the fatty component of the mass on CT may provide clues for the diagnosis of an exophytic angiomyolipoma (Fig. 7).

Bottom Line: The beak sign and the feeding artery of a tumor are useful diagnostic indicators of exophytic hepatic tumors.Two- or three-dimensional reformation images are also helpful for diagnosis.The CT features of exophytic hepatic tumors are similar to those of the usual intrahepatic tumors except for their location.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Kyung Hee University Medical Center, Dongdaemun-Gu, Seoul, Korea. radhjkim@khu.ac.kr

ABSTRACT
Our objective is to describe the CT features of exophytic hepatic tumors those may pose a diagnostic challenge because of the uncertainty of tumor origin. The beak sign and the feeding artery of a tumor are useful diagnostic indicators of exophytic hepatic tumors. Two- or three-dimensional reformation images are also helpful for diagnosis. The CT features of exophytic hepatic tumors are similar to those of the usual intrahepatic tumors except for their location.

Show MeSH
Related in: MedlinePlus