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The analysis of enhancement pattern of hepatic inflammatory pseudotumor on contrast-enhanced ultrasound

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Abstract

Objective

The aim of this study was to assess the role of contrast-enhanced ultrasound (CEUS) in the characterization of hepatic inflammatory pseudotumor (IPT).

Methods

We retrospectively reviewed 36 cases of histopathologically diagnosed IPT. Nodule enhancement appearances during the arterial, portal, and delayed phases were defined as hyperenhancement, isoenhancement, hypoenhancement, and non-enhancement compared with the surrounding liver parenchyma. Statistical analysis was performed by the one-way ANOVA and χ 2 tests.

Results

Among total 36 cases, 7 nodules were absent of contrast enhancement during all three phrases on CEUS. Twenty-nine nodules appeared different forms of enhancement in arterial phase. Diffuse homogeneous hyperenhancement, diffuse heterogeneous hyperenhancement, peripheral rim-like enhancement, and diffuse iso-enhancement were found in 10, 12, 5, and 2 of the nodules, respectively. Twenty-five nodules showed hypoenhancement in portal and delayed phases. Four nodules showed contrast washed out synchronously with normal liver parenchyma. The median time to enhancement, median time to peak, and median time to wash out of the nodules were 17 s (range 11–28 s), 23 s (range 14–42 s), and 45 s (range 23–100 s), respectively. No statistical significant differences were found in the above parameters of nodule enhancement and proportion of enhancement patterns when dividing the nodules into subgroups by nodule size.

Conclusion

IPT displays a variety of enhancement patterns due to pathological changes in the course of disease progression. Some characteristics on CEUS may be helpful in the differential diagnosis of IPT.

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Authors and Affiliations

  1. Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai, 200032, China

    Wen-Tao Kong, Wen-Ping Wang, Bei-Jian Huang, Hong Ding & Feng Mao

  2. Department of Hepatobiliary Surgery, Drum Tower Hospital, Medical College of Nanjing University, Nanjing, 210008, China

    Hao Cai

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  1. Wen-Tao Kong
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  2. Wen-Ping Wang
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  3. Hao Cai
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  4. Bei-Jian Huang
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  5. Hong Ding
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  6. Feng Mao
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Correspondence to Wen-Ping Wang.

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Kong, WT., Wang, WP., Cai, H. et al. The analysis of enhancement pattern of hepatic inflammatory pseudotumor on contrast-enhanced ultrasound. Abdom Imaging 39, 168–174 (2014). https://doi.org/10.1007/s00261-013-0051-3

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