The Diagnostic Value of Hyperostosis in Midline Subfrontal Meningioma

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Abstract
Roentgenologic analysis of 66 patients with proved midline subfrontal meningioma indicates a very high incidence of hyperostosis. A total of 63 patients (95%) showed varying degrees of hyperostosis involving the cribriform plate, planum sphenoidale or tuberculum sellae (including the chiasmatic sulcus). The planum sphenoidale is the most common site of hyperostosis (59%). In 19 cases (29%), the region of hyperostosis did not correspond to the site of tumor attachment. Mild or localized hyperostosis may be apparent only on tomograms. Small blistering and saw-tooth-like osteoma formation are reliable early signs of midline subfrontal meningioma. Midline subfrontal meningioma can be virtually ruled out if hyperostosis is absent.

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