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Malignant Hemangiopericytoma
Definition 1
An uncommon malignant neoplasm arising from pericytes. Distinction between benign and malignant hemangiopericytoma may be difficult or even impossible on morphologic grounds alone. (NCI Thesaurus)
Definition 2
A malignant neoplasm originating from vascular pericytes (cells in the periphery of vessels). (NCI Thesaurus/CDISC)
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