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英文誌(2004-)

Journal of Medical Ultrasonics

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1995 - Vol.22

Vol.22 No.01

Case Report(症例報告)

(0055 - 0060)

A Case of Focal Nodular Hyperplasia of the Liver Accompanied by a Marginal Hypoechoic Zone in the Ultrasonogram

Kazumi FUJIOKA1, Eiichi SANUKI1, Rikisaburo KAMATA1, Masahiro YAMAMOTO2

1Department of Radiology Nihon University School of Medicine, 2Second Department of Pathology Nihon University School of Medicine

キーワード : Focal nodular Hyperplasia, Ultrasonic angiography, Marginal hypoechoic zone

A clinically and histopathologically based diagnosis of focal nodular hyperplasia (FNH) of the liver was made in the case of a 36-year-old woman. Ultrasonic angiography showed a filling pattern centrifugal to the periphery during the early phase after an injection of carbon dioxide (CO2) microbubbles. Ultrasonic angiography after CO2 injection helped to confirm the diagnosis. A marginal hypoechoic zone (halo) around the lesion proved to be a significant finding in differentiating FNH from hepatocellular carcinoma. Comparison of the ultrasonographic and histopathological findings led us to presume that the halo was caused by proliferative vessels surrounding the tumor.