Diplopia and headache slowly progressed over 2 months duration
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Focal osseous expansion, remodelling and hyperostosis of the left sphenoid wings with associated mild proptosis of the left eye. No sizable soft tissue component. No evidence of intracranial extension or soft tissue mass.
Extradural meningioma originates from meningiocytes that entrapped within a suture or fracture line. it may be purely calvarial or shows extracalvarial extension. Differential diagnosis include osseous metastatic deposits, osteosarcoma, giant cell tumor, haemangioma and epidermoid cyst.
This patient went on to surgery (wide local resection) and histology confirmed the diagnosis of meningioma.
- Tokgoz N, Oner YA, Kaymaz M et-al. Primary intraosseous meningioma: CT and MRI appearance. AJNR Am J Neuroradiol. 2005;26 (8): 2053-6. Pubmed citation