MedicineOncologyPathologyOncologic SurgeryOrthopaedic OncologySurgical PathologyAneurysmal Bone CystPelvic TumorsSpinal TumorsDifferential Diagnosis CriteriaEpendymoma PathologyGiant Cell Tumor ImagingGross Differential DiagnosisPelvic Tumor PathologyPrimary Aneurysmal Bone CystPrimary Pelvic Bone TumorsSacral Anatomy
There have been few reports documenting primary myxopapillary ependymomas in the sacrococcygeal region that result in extensive involvement of the sacrum. We present a 21-year-old man whose CT and MR findings showed massive bony destruction of the sacrum and a large lobulated soft tissue mass. Myxopapillary ependymoma should be included along with giant cell tumor, chordoma, and aneurysmal bone cyst in the differential diagnosis of a destructive osteolytic sacral lesion.