60 y/o male with a 1-yr history of a gluteal mass, pain, and bowel incontinence. Radiographs showed a lytic lesion in the sacrum. Sacrococcygeal chordomas almost always cause pain at the tip of the spinal column. Bowel and bladder symptoms occur late and are due to pressure effects of tumor or destruction of nerves emerging from the spinal cord. Chordomas always show lobulated appearance with fibrous septa separating the lobules.
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