Contrast-enhanced ultrasonography using levovist: Usefulness of diagnosis of small focal nodular hyperplasia lesions |
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Authors: | Yoshiaki Miura FJSUM Koryo Kondo Junko Oikawa Hidekatsu Kuroda Kazuhiro Kasai Michiru Yamada Kazuyuki Suzuki Yoshinori Takahashi RMS Takahiko Kawata Yutaka Takeda Hirohiko Obara |
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Institution: | (1) First Department of Internal Medicine, Iwate Medical University, 19-1 Uchimaru, 020-8505 Morioka, Japan;(2) Ultrasonic Laboratory Division, Sogo Hanamaki Hospital, 4-18 Kajo, 025-0075 Hanamaki, Japan;(3) Department of Gastroenterology, Sogo Hanamaki Hospital, 4-18 Kajo, 025-0075 Hanamaki, Japan;(4) First Department of Internal Medicine Hachinohe Red Cross Hospital, 2 Nakaaketo, Tamonoki, 039-1104 Hachinohe, Japan |
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Abstract: | Differential diagnosis of focal nodular hyperplasia and hepatocellular carcinoma is clinically important because, while both
are hypervascular tumors, they have vastly different prognoses. Because the spoke-wheel appearance is the primary characteristic
of focal nodular hyperplasia, we attempted to detect this pattern in nodules smaller than 3 cm in diameter with contrast-enhanced
ultrasonography using a contrast agent (Levovist). Four patients were examined with contrast-enhanced US: two of the patients
were examined with Coded Harmonic Angio; the other two patients were examined with contrast-enhanced color and power Doppler
US without harmonic imaging. Although the hepatic arteriogram showed the spoke-wheel appearance in only one tumor (diameter,
3 cm), contrast-enhanced US clearly demonstrated this characteristic in all four tumors, including three tumors that were
less than 2 cm in diameter. Because it is noninvasive and can be carried out in an outpatient clinic, contrast-enhanced US
is extremely useful for diagnosing small focal noduler hyperplasia lesions at sites that can be observed with US. |
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Keywords: | contrast-enhanced color Doppler imaging contrast-enhanced power Doppler imaging focal nodular hyperplasia harmonic imaging Levovist? |
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