telangiectatic osteogenic sarcoma

n.
  1. A cystic form of osteogenic sarcoma in which aneurysmal blood-filled spaces are lined with sarcoma cells that produce osteoid.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.