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Angiomyolipoma of the liver: significance of CT and MR dynamic study

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Abstract

Angiomyolipoma is a benign mesenchymal tumor that has been reported frequently in the kidney but rarely in the liver. In the present study, we present four cases of hepatic angiomyolipoma with different radiologic appearances, discuss differential diagnosis, and review previously reported cases. One of our cases was followed for 8 years. Computed tomography (plain, enhanced, and dynamic study), magnetic resonance imaging (T1-weighted spin echo, T2-weighted spin echo, and dynamic study), ultrasonography, and angiography were performed in all cases. Although different radiologic appearances were observed in the tumors, based on different proportions of fat, blood vessels, and muscle, three cases were diagnosed as angiomyolipoma. In one case, it was quite difficult to make radiologic diagnosis; hepatocellular carcinoma with fatty metamorphosis in part was most likely suspected, but histopathological examination revealed angiomyolipoma with few fat elements. In the present study, early and prolonged enhancement of the lesion with the special pattern of time density/intensity curve was significant for angiomyolipoma, and we suggest that preoperative radiologic diagnosis of the lesion is possible in most of the cases. However, it can be quite difficult to distinguish angiomyolipoma from some hepatocellular carcinomas with fatty metamorphosis.

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Authors and Affiliations

  1. Department of Radiology, Institute of Clinical Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305, Ibaraki, Japan

    T. Ahmadi, Y. Itai, M. Takahashi, H. Onaya, T. Kobayashi & Y. O. Tanaka

  2. Department of Gastroenterology, Institute of Clinical Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, 305, Ibaraki, Japan

    Y. Matsuzaki & N. Tanaka

  3. Department of Radiology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113, Tokyo, Japan

    Y. Okada

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  1. T. Ahmadi
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  2. Y. Itai
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  3. M. Takahashi
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  4. H. Onaya
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  9. Y. Okada
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Ahmadi, T., Itai, Y., Takahashi, M. et al. Angiomyolipoma of the liver: significance of CT and MR dynamic study. Abdom Imaging 23, 520–526 (1998). https://doi.org/10.1007/s002619900391

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  • DOI: https://doi.org/10.1007/s002619900391

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