CardioVascular and Interventional Radiology

, Volume 29, Issue 6, pp 1022–1026 | Cite as

Clinical Assessment of Percutaneous Radiofrequency Ablation for Painful Metastatic Bone Tumors

  • Hiroyuki Kojima
  • Noboru Tanigawa
  • Shuji Kariya
  • Atsushi Komemushi
  • Yuzo Shomura
  • Satoshi Sawada



To investigate the pain-alleviating effects of radiofrequency ablation (RFA) on metastatic bone tumors in relation to tumor size, combined therapy, and percent tumor necrosis rate following RFA.


Subjects comprised 24 patients with 28 painful metastatic bone tumors. A 17G internally cooled electrode was inserted into the tumor for CT guidance and ablation was performed. Bone cement was injected following RFA for 4 tumors involving a weight-bearing bone, while 5 tumors were treated using combined RFA and external irradiation. Percent necrosis rate of the tumor was measured using contrast-enhanced computed tomography 1 week after RFA.


Improvement in the visual analog scale (VAS) score was 4.6 ± 2.2 for large tumors (>5 cm, n = 12), 3.7 ± 1.8 for medium-sized tumors (3.1–5.0 cm, n = 11), and 3.5 ± 1.7 for small tumors (≤3 cm, n = 4), with no significant differences noted among tumor sizes. Improvement in the VAS score was 3.5 ± 1.3 for the 4 tumors in the RFA + bone cement group, 3.2 ± 1.9 for the 5 tumors in the RFA + radiation therapy group, and 4.8 ± 2.2 for the 18 tumors in the RFA group. No significant differences were identified between groups. The improvement in the VAS score was 3.8 ± 2.3, 4.0 ± 1.9, and 4.7 ± 2.6 in patients with tumor necrosis rates of 0–49%, 50–74%, and 75–100%, respectively. No significant association was observed among these three groups.


Percutaneous RFA therapy was effective in relieving pain due to metastatic bone tumors. No relationships appear to exist between initial response and tumor size, combined therapy, and percent tumor necrosis.


Bone neoplasm Computed tomography (CT) guidance Metastases Radiofrequency ablation 


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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Hiroyuki Kojima
    • 1
  • Noboru Tanigawa
    • 1
  • Shuji Kariya
    • 1
  • Atsushi Komemushi
    • 1
  • Yuzo Shomura
    • 1
  • Satoshi Sawada
    • 1
  1. 1.Department of RadiologyKansai Medical University Takii HospitalMoriguchiJapan

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