Abstract
A 56-year-old man presented with an 8-month history of lower back pain radiating down the posterior aspect of the thighs bilaterally and a 5-month history of perianal paresthesia. These symptoms markedly increased in severity 1 day before admission and were associated with difficulty passing urine. Examination revealed reduced sensation in an S2–S4 distribution. Magnetic resonance imaging of the spine showed a T1 hypointense (Fig. 1), T2 hyperintense (Fig. 2) central mass within the sacral anterior epidural space which was eroding into the posterior aspect of the S1, S2, and S3 vertebral bodies and causing severe stenosis of the S1 and S2 sacral foramina bilaterally. Further to these investigations, a biopsy was conducted under computed tomography guidance. The histologic diagnosis was chordoma. This patient
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