Giant destructive myxopapillary ependymomas of the sacrum.
Myxopapillary ependymomas rarely present as a primary intrasacral lesion, and extensive sacral osteolysis is unusual. The authors report a case series of 6 patients with these complex tumors causing extensive sacral destruction, who underwent resection, lumbopelvic reconstruction, and fusion. The operative procedure, complications, and outcome are summarized after a mean follow-up of 3.55 years (range 18-80 months).