Definition: An uncommon vascular, usually benign, neoplasm composed of round and spindle cells that are derived from the pericytes and surround endothelium-lined vessels; malignant hemangiopericytomas are difficult to distinguish microscopically from the benign.
[hemangio- + pericyte + G. -oma, tumor]
© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.