臨牀消化器内科 Vol.25 No.4(5-2)


特集名 肝癌診療のアルゴリズム2010
題名 肝癌の治療 (2) 肝癌に対するラジオ波焼灼術(RFA)
発刊年月 2010年 04月
著者 椎名 秀一朗 東京大学医学部消化器内科
著者 増崎 亮太 東京大学医学部消化器内科
著者 近藤 祐嗣 東京大学医学部消化器内科
著者 建石 良介 東京大学医学部消化器内科
著者 五藤 忠 東京大学医学部消化器内科
著者 小池 和彦 東京大学医学部消化器内科
【 要旨 】 ラジオ波焼灼術(RFA)は病変部に挿入した電極周囲を誘電加熱し腫瘍を壊死させる治療法である.根治的治療であるが,低侵襲で,再発時の再治療も容易である.RFAで良好な成績を上げるには,術前のプランニング,実際の手技,治療後の評価の三つをきちんと行う必要がある.診療ガイドラインでは,肝切除がRFAなどの経皮的局所療法より推奨されているが,現場では,肝切除は減少しRFAが増加している.技術不足や認識不足による施設間,術者間の成績格差が大きいという問題はあるが,適切に行われれば,局所的根治,長期生存が可能なことには疑問の余地はない.RFAの治療成績は今後さらに向上し,肝腫瘍の治療でますます重要な役割を演ずるだろう.
Theme Algorithm for Diagnosis and Treatment of Liver Cancer
Title Radiofrequency Ablation for Hepatocellular Carcinoma
Author Shuichiro Shiina Department of Gastroenterology, University of Tokyo
Author Ryota Masuzaki Department of Gastroenterology, University of Tokyo
Author Yuji Kondo Department of Gastroenterology, University of Tokyo
Author Ryosuke Tateishi Department of Gastroenterology, University of Tokyo
Author Tadashi Goto Department of Gastroenterology, University of Tokyo
Author Kazuhiko Koike Department of Gastroenterology, University of Tokyo
[ Summary ] Radiofrequency ablation (RFA) destroys cancer tissue by generating heat around the inserted electrode. RFA is usually done percutaneously with image-guidance, such as ultrasound or CT, but sometimes done with laparoscopy, or laparotomy. RFA is potentially curative, minimally invasive, and easily repeatable for recurrence. To achieve satisfactory results, pretreatment planning, treatment itself, and posttreatment evaluation are all important. A Japanese guideline recommends liver resection more than ablation therapy. However, the number of patients who undergo surgery has been declining while that of patients who receive RFA has been increasing. RFA has achieved considerably good longterm outcomes and has been considered a safe procedure. RFA has a problem that treatment outcomes are markedly different from institute to institute, or from operator to operator, due to insufficient technique or knowledge. However, there is no doubt that local curativeness and longterm survival can be achieved by RFA if it is done properly. Advances in RFA machines, innovations in imaging modalities, establishment of the training program and others will further improve treatment outcomes of RFA, and RFA will play a greater role in the treatment of liver tumors.
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