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Radiofrequency Ablation Combined with CO₂ Injection for Treatment of Retroperitoneal Tumor: Protecting Surrounding Organs Against Thermal Injury

¹ Department of Radiology, Kansai Medical University, 10-15 Fumizono, Moriguchi, Osaka, Japan 570-8507.
² Department of Radiology, Ishikiri Seiki Hospital, Osaka, Japan 579-8026.

OBJECTIVE. The objective of this study was to separate target tumors from adjacent structures by injecting carbon dioxide (CO₂) around the tumor to avoid thermal injury and the heat-sink effect from the blood vessel during percutaneous radiofrequency ablation.

CONCLUSION. We successfully achieved complete ablation of a retroperitoneal tumor without thermal injury. Imaging-guided percutaneous CO₂ injection is useful for preventing thermal injury while achieving complete ablation of the tumor during radiofrequency ablation.

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