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Radiofrequency Ablation of Hepatic Tumors: Variability of Lesion Size Using a Single Ablation Device

Richard S. Montgomery1, Andres Rahal2, Gerald D. Dodd, III2, John R. Leyendecker2 and Linda G. Hubbard2

1 Medical School, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229-3900.
2 Department of Radiology, The University of Texas Health Science Center at San Antonio, Mail Code 7800, 7703 Floyd Curl Dr., San Antonio, TX 78229-3900.



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  		Fig. 1A. —15-year-old girl with 0.8-cm hepatic metastasis from gastrointestinal stromal tumor with small thermal lesion after radiofrequency ablation. CT scan before ablation shows tumor (arrow) in liver segment VI.

 


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  		Fig. 1B. —15-year-old girl with 0.8-cm hepatic metastasis from gastrointestinal stromal tumor with small thermal lesion after radiofrequency ablation. CT scan after one ablation shows 1.7-cm avascular lesion (arrow) at site of ablation.

 


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  		Fig. 2A. —71-year-old man with 0.9-cm hepatic metastasis from colon carcinoma with large thermal lesion after radiofrequency ablation. CT scan before ablation shows tumor (arrow) in liver segment VI.

 


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  		Fig. 2B. —71-year-old man with 0.9-cm hepatic metastasis from colon carcinoma with large thermal lesion after radiofrequency ablation. CT scan after one ablation shows 3.4-cm avascular lesion (black arrow) at site of ablation. Note additional ablation lesion (white arrow) in segment V.

 


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  		Fig. 3A. —53-year-old man with 3.4-cm hepatocellular carcinoma with large thermal lesion after radiofrequency ablation. CT scan before ablation shows tumor (arrow) in liver segment VIII.

 


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  		Fig. 3B. —53-year-old man with 3.4-cm hepatocellular carcinoma with large thermal lesion after radiofrequency ablation. CT scan after solitary ablation shows 4.9-cm avascular thermal lesion (arrow) at site of ablation.

 

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