Musculoskeletal ImagingMeningioma
a
tumour of the
meninges, which is usually located extramedullary and intradurally (
Fig.1). Meningiomas occur in
neurofibromatosis, among other conditions.
Although myelography and CT scanning have been used in the evaluation of meningiomas, these imaging techniques have essentially been replaced by MR imaging. On T1-weighted images, meningiomas are of higher signal intensity than cerebrospinal fluid, whereas on T2-weighted images, they are of lower signal intensity. The tumours show marked contrast enhancement. Calcification of meningiomas sometimes occurs.
DR/RB
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Lateral radiograph (a) and CT scan (b) demonstrate reactive hyperostosis involving the inner and outer tables of the calvarium. Also note the eccentric erosion of the inner table in (b) owing to the underlying meningioma.
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Meningioma, Fig.1 (a) | | Meningioma, Fig.1 (b) | |