myxosarcoma

[mĭk′sō-sär-kōmə]
n.
  1. A sarcoma characterized by immature, relatively undifferentiated cells that grow rapidly and invade extensively, resulting in tissue that resembles primitive mesenchymal tissue.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.