title: Spinal meningioma containing bone: a case report and review of literature.
abstract: Meningiomas constitute about 25% of primary spinal tumours and 1% to 5% of them are calcified. Ossification is a rare event and is rarely reported. Here, the case of a 40-year-old woman who had dorsal spinal cord meningioma (globular variety) at the T(6) vertebral level is reported; the meningioma showed a nidus of T2 weighting hypointensity on MRI as well as a bony chip inside the tumour intraoperatively. The tumour was successfully resected. Though the aetiology of ossification in the meningioma is not well known, metaplasia of arachnoid cells/dystrophic calcification may be the cause. Ossified meningiomas are more difficult to resect than the usual variety. Hypointensity inside tumour in T2-weighted images of MRI should make the surgeon suspicious of this condition, which may in some cases complicate tumour resection.
authors.affiliation: Catholic Health System, State University of New York at Buffalo, Internal Medicine, 565 Abbott Rd, Mercy Hospital of Buffalo, Buffalo, New York, 14220, USA.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Tahir
authors.forename: Nida
authors.initials: N
authors.lastname: Usmani
authors.forename: Faiz U
authors.initials: FU
authors.lastname: Ahmad
authors.forename: Sueba
authors.initials: S
authors.lastname: Salmani
authors.forename: Manish S
authors.initials: MS
authors.lastname: Sharma