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psammomatous meningioma


Definition: a firm cellular neoplasm derived from fibrous tissue of the meninges, choroid plexus, and certain other structures associated with the brain, characterized by the formation of multiple, discrete, concentrically laminated, calcareous bodies (psammoma bodies); most such neoplasms are histologically benign but may lead to severe symptoms as a result of compressing the brain.

Synonym(s): sand tumor, Virchow psammoma

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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