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©2012 Baishideng Publishing Group Co., Limited. All rights reserved.
CT-guided radiofrequency ablation of osteoid osteoma in the long bones of the lower extremity
Yoshiki Asayama, Akihiro Nishie, Kousei Ishigami, Daisuke Kakihara, Yasuhiro Ushijima, Yukihisa Takayama, Nobuhiro Fujita, Tsuyoshi Tajima, Kengo Yoshimitsu, Shuichi Matsuda, Yukihide Iwamoto, Hiroshi Honda
Yoshiki Asayama, Akihiro Nishie, Kousei Ishigami, Yasuhiro Ushijima, Yukihisa Takayama, Nobuhiro Fujita, Hiroshi Honda, Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
Daisuke Kakihara, Department of Molecular Imaging and Diagnosis, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
Tsuyoshi Tajima, Department of Diagnostic Imaging and Nuclear Medicine, Tokyo Women’s Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan
Kengo Yoshimitsu, Department of Radiology, Fukuoka University, 7-45-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan
Shuichi Matsuda, Yukihide Iwamoto, Department of Orthopaedic Surgery, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
Author contributions: All authors participated in study concepts, study design, data acquisition and manuscript review; Asayama Y and Nishie A analysis the data; Asayama Y, Nishie A and Tajima T preparated the manuscript; Asayama Y, Nishie A and Honda H edited the paper.
Correspondence to: Yoshiki Asayama, MD, Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan. asayama@radiol.med.kyushu-u.ac.jp
Telephone: +81-92-6425695 Fax: +81-92-6425708
Received: December 22, 2012
Revised: April 16, 2012
Accepted: April 23, 2012
Published online: June 28, 2012
AIM: To present our initial experience with computed tomography guided radiofrequency ablation (RFA) of osteoid osteoma (OO) in our institution.
METHODS: RFA was performed on eight patients (5 males and 3 females) with clinically and radiologically diagnosed OO (femoral neck, n = 4; femoral diaphysis, n = 2; tibial diaphysis, n = 1; fibular diaphysis, n = 1). Ablation was performed using an electrode with a 10-mm exposed tip for a total of 4-6 min at a targeted temperature of 90 degrees Celsius. No cooling system was used. The intervention was accepted as technically successful if the tip of the electrode could be placed within the center of the nidus. We defined clinical success as a disappearance within 2 wk after treatment of symptoms that had manifested at presentation.
RESULTS: All procedures were technically successful. No major or immediate complications were observed. Clinical success was achieved in six of eight patients in the first procedure. A second procedure was performed for two patients who had recurrent or continued pain, and one of these cases was successfully treated. The overall rate of success was 87.5% (7/8). No complication was observed.
CONCLUSION: Our preliminary results indicate a favorable success rate and no complications and are compatible with the previous reports of RFA of OO.
