mesenchymoma

[mĕz′ən-kī-mōmə, -kə-]
n. pl. mes•en•chy•mo•mas
  1. A neoplasm containing a mixture of cells resembling those of the mesenchyme and its derivatives other than fibrous tissue.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.