Clinicopathologic features of incidental meningiomas: A review of the literature and the University of Rochester autopsy experience.

OBJECTIVE: Features of incidental meningiomas, found at autopsy, have not been extensively reported and may offer insight into their biology and management.

DESIGN: Review of the literature on unsuspected incidental antemortem and postmortem meningiomas and those from autopsies, at the University of Rochester from 2005 to 2016.

RESULTS: At autopsy, incidental meningiomas were usually found in 2 - 3% of cases. Incidental meningiomas found by neuroimaging were more commonly seen over the convexities, although our findings suggest that parasellar meningiomas are common. They are and are more commonly in males, WHO grade I, and fibrous or meningothelial, but our findings suggest psammomatous meningiomas are over-represented.

CONCLUSION: Incidental meningiomas are a relatively common unrecognized tumor. They are more likely to be in males, WHO grade I, parasellar, and with calcification.
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