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Figure 3. 47-year-old female with sacral chordoma. (A) Sagittal T1-weighted, (B) sagittal short tau inversion recovery (STIR), and (C) axial T2-weighted images of the lumbar spine show a marrow-replacing lesion in the L2 vertebral body, detected during routine imaging surveillance of the entire spine, consistent with metastatic disease (*). No other lesions were detected. Biopsy of the lesion revealed metastatic chordoma. The patient was asymptomatic from this lesion and presented for radiofrequency ablation of oligometastatic disease. (D) Prone axial CT image during radiofrequency ablation of the L2 lesion shows 2 radiofrequency probes inserted into the lesion using a bipedicular approach (arrows). Because of the midline location of the lesion within the vertebral body, a bipedicular approach was needed to ensure maximum ablative coverage of the lesion.