title: Cystic extramedullary ependymoma.
abstract: Intradural extramedullary location of ependymoma is rare. To the best of our knowledge, only 9 cases have been described in the literature. We report a case of a histologically confirmed ependymoma (WHO grade II) presented in the MR imaging as a cystic, nonenhancing thoracic intradural extramedullary lesion compressing the spinal cord. The cystic appearance mimicking an arachnoid cyst at diagnosis and the leptomeningeal dissemination developed later were peculiarities that have never been previously described in relation to these rare tumors.
authors.affiliation: Department of Neuroradiology, Erasme University Hospital, Brussels, Belgium.
authors.forename: J
authors.initials: J
authors.lastname: Graça
authors.forename: N
authors.initials: N
authors.lastname: Gültasli
authors.forename: N
authors.initials: N
authors.lastname: D'Haene
authors.forename: J
authors.initials: J
authors.lastname: Brotchi
authors.forename: I
authors.initials: I
authors.lastname: Salmon
authors.forename: D
authors.initials: D
authors.lastname: Balériaux
mesh_terms: D000368:Aged; D016080:Arachnoid Cysts / Q000473:pathology; D003937:Diagnosis, Differential; D004806:Ependymoma / Q000473:pathology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D013120:Spinal Cord Neoplasms / Q000473:pathology*; D013904:Thoracic Vertebrae