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. 2009 Jun 25;10(4):366–376. doi: 10.3348/kjr.2009.10.4.366

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Copyright © 2009 The Korean Society of Radiology

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 5 — Imaging findings for 59-year-old man with local tumor progression after radiofrequency ablation are presented. Electrode was inserted into tumor parallel to gallbladder wall.

A. Contrast-enhanced CT scan obtained during arterial phase shows 3.0-cm hepatocellular carcinoma (arrow) adjacent to gallbladder in liver segment V.

B. Oblique sonogram obtained during radiofrequency ablation shows hypoechoic mass adjacent to gallbladder. Single ablation with 3-cm single straight electrode (arrows) was performed for 12 minutes. Also, note 3-cm active tip of electrode between electronic calipers.

C. Contrast-enhanced CT scan obtained immediately after radiofrequency ablation shows low-attenuation ablation zone with peripheral hyperemia (arrow).

D. Contrast-enhanced CT scan obtained three months after radiofrequency ablation shows nodular enhancing lesion (arrow) at inferomedial aspect of ablation zone that is indicative of local tumor progression.