Meningiomas - volcano sign

Case contributed by dr Nerses Nersesyan
Annotated image

A side by side diagram visualizing the recently colloquially described meningioma sign showing triangular hyperostosis at the base of the meningioma (mountain) with the tumor being the cloud. You can even think of the intratumoral flow voids radiating from the apex of the hyperostosis as being the ejected debris from the volcano. 

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