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Radiofrequency ablation for hepatocellular carcinoma: assistant techniques for difficult cases.

Abstract：

PURPOSE:To confirm the safety and effectiveness of techniques to assist radiofrequency ablation (RFA) for difficult cases, we retrospectively evaluated successful treatment rates, early complications and local tumor progressions. PATIENTS AND METHODS:Between June 1999 and April 2009, a total of 341 patients with 535 nodules were treated as difficult cases. Artificial pleural effusion assisted ablation was performed on 64 patients with 82 nodules. Artificial ascites-assisted ablation was performed on 11 patients with 13 nodules. Cooling by endoscopic nasobiliary drainage (ENBD) tube-assisted ablation was performed on 6 patients with 8 nodules. When the tumors were not well visualized with conventional B-mode ultrasonography (US), contrast-enhanced US-assisted ablation with Levovist or Sonazoid or virtual CT sonography-assisted ablation was performed. Contrast-enhanced US-assisted ablation was performed on 139 patients with 224 nodules and virtual CT sonography-assisted ablation was performed on 121 patients with 209 nodules. RESULTS:In total, complete ablation was achieved in 514 of 535 (96%) nodules in difficult cases. For RFA with artificial pleural effusion, artificial ascites and ENBD, complete response was confirmed in all cases. For contrast-enhanced US- and CT sonography-assisted ablation, complete response was 95%. Early complications were recognized in 24 cases (4.5%). All cases recovered with no invasive treatment. Local tumor recurrence was investigated in 377 nodules of 245 patients, and 69 (18%) nodules were positive. Tumor recurrences in each assisted technique were 14.7% in artificial pleural effusion cases, 7% in artificial ascites, 12.5% in ENBD tube cases, 31% in virtual CT sonography, and 8.5% in contrast-enhanced US. CONCLUSION:Although local tumor progression needs to be carefully monitored, assisted techniques of RFA for difficult cases are well tolerated and expand the indications of RFA.

journal_name

Oncology

journal_title

Oncology

authors

Inoue T,Minami Y,Chung H,Hayaishi S,Ueda T,Tatsumi C,Takita M,Kitai S,Hatanaka K,Ishikawa E,Yada N,Hagiwara S,Ueshima K,Kudo M

doi

10.1159/000315236

subject

Has Abstract

pub_date

2010-07-01 00:00:00

pages

94-101

eissn

0030-2414

issn

1423-0232

pii

000315236

journal_volume

78 Suppl 1

pub_type

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Radiofrequency ablation for hepatocellular carcinoma: assistant techniques for difficult cases.