hemangiopericytoma

[hĭ-măn′gē-ō-pĕr′ĭ-sī-tōmə]

n.

A rare vascular, usually benign neoplasm composed of round and spindle cells presumably derived from pericytes.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.