Chordoma is a malignant tumor that usually occurs in the sacrum, coccyx, or at the base of the skull. It arises from notocord remnants.
Chordoma usually occurs within the fifth to seventh decade.
Chordoma in the sacrum and coccyx may present as "low low" back pain or tenderness, or with symptoms of obstruction such as constipation or painful bowel movements. On plain X-ray, chordomas appear as a solitary mid-line lesion with bony destruction. There is often an accompanying soft tissue mass.
... Read Full Entry