Skip Navigation LinksHome > November/December 2013 - Volume 37 - Issue 6 > “Nondefect” of Arterial Enhancing Rim on Hepatobiliary Phase...
Journal of Computer Assisted Tomography:
doi: 10.1097/RCT.0b013e318297211a
Gastrointestinal Imaging

“Nondefect” of Arterial Enhancing Rim on Hepatobiliary Phase in 3.0-T Gadolinium-Ethoxybenzyl-Diethylenetriamine Pentaacetic Acid–Enhanced Liver Magnetic Resonance Imaging: Distinguishing Hepatic Abscess from Metastasis

Choi, Seung Hee MD*; Lee, Chang Hee MD, PhD*; Kim, Baek Hui MD; Lee, Jongmee MD*; Choi, Jae Woong MD*; Park, Yang Shin MD*; Kim, Kyeong Ah MD*; Park, Cheol Min MD*

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Abstract

Objective

The objective of this study was to retrospectively determine the findings of Gd-EOB-DTPA (gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid)–enhanced magnetic resonance imaging (MRI) to distinguish abscess from metastasis of the liver.

Methods

Among patients who underwent Gd-EOB-DTPA MRI from March 2008 to December 2011, 32 patients with abscess or metastasis were included, and all lesions showed arterial rim enhancement. Twenty-one abscesses and 19 metastases were included. Two radiologists assessed how the arterial enhancing rim showed in hepatobiliary phase (HBP) and classified the signal intensity of the rim into defect zone, gray zone, and uptake zone. The frequency of showing nondefect, which means gray or uptake zone between both lesions, was compared using Pearson χ2 test.

Results

The rim of arterial enhancement in 3 abscesses (14.3%) and 15 metastases (78.9%) showed defect zone in HBP. Six abscesses (28.6%)and no metastases showed gray zone, and 12 abscesses (57.1%) and 4 metastases (21.1%) showed uptake zone. The frequency of nondefect in the rim of arterial enhancement on HBP was significantly higher in abscesses (85.7% of abscesses, 21.1% of metastases, P < 0.001).

Conclusions

A reliable finding that distinguished abscess from metastasis was nondefect of arterial enhancing rim on HBP in Gd-EOB-DTPA MRI. This is a meaningful feature for differentiating abscess from metastasis, especially when evaluating patients with primary malignancy.

Copyright © 2013 by Lippincott Williams & Wilkins

  

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