Treatment of Osteoid Osteomas Using a Navigational Bipolar Radiofrequency Ablation System

  • Adam N. Wallace
  • Anderanik Tomasian
  • Randy O. Chang
  • Jack W. Jennings
Technical Note



Percutaneous CT-guided radiofrequency ablation is a safe and effective minimally invasive treatment for osteoid osteomas. This technical case series describes the use of a recently introduced ablation system with a probe that can be curved in multiple directions, embedded thermocouples for real-time monitoring of the ablation volume, and a bipolar design that obviates the need for a grounding pad.


Medical records of all patients who underwent radiofrequency ablation of an osteoid osteoma with the STAR Tumor Ablation System (DFINE; San Jose, CA) were reviewed. The location of each osteoid osteoma, nidus volume, and procedural details were recorded. Treatment efficacy and long-term complications were assessed at clinical follow-up.


During the study period, 18 osteoid osteomas were radiofrequency ablated with the multidirectional bipolar system. Lesion locations included the femur (50 %; 9/18), tibia (22 %; 4/18), cervical spine (11 %; 2/18), calcaneus (5.5 %; 1/18), iliac bone (5.5 %; 1/18), and fibula (5.5 %; 1/18). The median nidus volume of these cases was 0.33 mL (range 0.12–2.0 mL). All tumors were accessed via a single osseous channel. Median cumulative ablation time was 5 min and 0 s (range 1 min and 32 s–8 min and 50 s). All patients with clinical follow-up reported complete symptom resolution. No complications occurred.


Safe and effective CT-guided radiofrequency ablation of osteoid osteomas can be performed in a variety of locations using a multidirectional bipolar system.


Osteoid osteoma Radiofrequency ablation CT 


Compliance with Ethical Standards

Conflicts of Interest

Author JWJ—is a speaker panelist for DFINE and consultant for Galil.

Ethical Approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed Consent

Informed consent was obtained from all individual participants included in the study.


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Copyright information

© Springer Science+Business Media New York and the Cardiovascular and Interventional Radiological Society of Europe (CIRSE) 2015

Authors and Affiliations

  • Adam N. Wallace
    • 1
  • Anderanik Tomasian
    • 1
  • Randy O. Chang
    • 2
  • Jack W. Jennings
    • 1
  1. 1.Mallinckrodt Institute of RadiologyWashington University School of MedicineSaint LouisUSA
  2. 2.Washington University School of MedicineSaint LouisUSA

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