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Hepatic pseudolymphoma: imaging features on dynamic contrast-enhanced MRI and diffusion-weighted imaging

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Abstract

Purpose

To investigate dynamic contrast-enhanced (DCE) MR findings and diffusion-weighted imaging (DWI) characteristics of hepatic pseudolymphoma.

Materials and methods

The MR data of 20 lesions in 14 patients with histopathologically proven hepatic pseudolymphoma were retrospectively analyzed. All patients underwent dynamic gadopentetate dimeglumine-enhanced MR imaging and DWI. Morphologic characteristics and signal features on T1- and T2-weighted images (T1WI, T2WI), and DCE pattern were qualitatively evaluated. The quantitative analysis was performed for the size, the degree of enhancement on arterial phase, signal intensity (SI) of DWI, and apparent diffusion coefficient (ADC) values. The Wilcoxon signed ranks test was used for statistical analysis.

Results

The contour of all lesions was round. The lesion size was 0.7–2.8 cm (mean 1.3 ± 0.5 cm). All lesions manifested as homogeneous hypointensity on T1WI and hyperintensity on T2WI. All lesions were shown as hypervascular with various enhancement patterns on DCE MR imaging. The presence of peripheral enhancement and pseudocapsule was observed in 7 and 4 lesions, respectively. SI of the hepatic pseudolymphoma was significantly lower than that of portal vein on arterial phase (P < 0.001) and the ADC was significantly lower than that of spleen (P = 0.012).

Conclusion

A homogeneous nodule with small size (<2 cm), manifestation of hypervascular with lower SI than that of portal vein on arterial phase and lower ADC values than that of spleen are the common MR features of hepatic pseudolymphoma.

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Authors and Affiliations

  1. Shanghai Institute of Medical Imaging, No. 180 Fenglin Road, Xuhui District, Shanghai, 200032, China

    Yang Zhou, XiaoLin Wang, GuoFeng Zhou, MengSu Zeng & PengJu Xu

  2. Department of Radiology, Zhongshan Hospital, Fudan University, No. 180 Fenglin Road, Xuhui District, Shanghai, 200032, China

    Yang Zhou, GuoFeng Zhou, MengSu Zeng & PengJu Xu

  3. Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China

    XiaoLin Wang

  4. Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China

    Chen Xu

Authors
  1. Yang Zhou
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  2. XiaoLin Wang
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  3. Chen Xu
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Corresponding author

Correspondence to PengJu Xu.

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Funding

No funding was received for this study.

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study does not contain any studies with animals performed by any of the authors. For this type of study, formal consent is not required.

Informed consent

The institutional review board approved this study and waived informed consent because of retrospective study.

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Cite this article

Zhou, Y., Wang, X., Xu, C. et al. Hepatic pseudolymphoma: imaging features on dynamic contrast-enhanced MRI and diffusion-weighted imaging. Abdom Radiol 43, 2288–2294 (2018). https://doi.org/10.1007/s00261-018-1468-5

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  • DOI: https://doi.org/10.1007/s00261-018-1468-5

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