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A 60-year-old woman underwent radiofrequency (RF) ablation to relieve uncontrollable pain from a recurrent sacrococcygeal chordoma, which had been treated 6 years prior using proton therapy. Although the pain had disappeared completely after the first RF ablation, it recurred 4 months after ablation. Moreover, a residual tumor was observed. A second RF ablation was performed 9 months after the first RF ablation for the residual tumor, again alleviating all pain. Patient symptoms were well controlled 7 months after the second RF ablation.

Repeat Radiofrequency Ablation for Painful Sacrococcygeal Chordoma Refractory to Proton Therapy: A Case Report