Mediastinal myxopapillary ependymoma primary or late metastases of paracoccygeal ependymoma: a case report.

A 25-year-old woman presented in 2002 with progressive shortness of breath and weight loss. A computed tomographic scan of the chest showed a huge anterior mediastinal mass, and pathological examination of a mediastinoscopic needle biopsy revealed typical myxopapillary ependymoma, an extremely unusual diagnosis at this site. Further workup and questioning of the patient revealed that she had opted not to disclose a history of surgery for right gluteal fold mass in 1993, which was primarily treated with surgery followed by radiotherapy for relapse. Review of the histology of the excised mass showed a myxopapillary ependymoma, similar to current histology. Clinical examination of the local gluteal and paracoccygeal site, computed tomographic imaging, and magnetic resonance imaging failed to demonstrate any evidence of recurrent disease in soft tissue or bone. The case is presented, and this very unusual presentation is discussed.