circumscribed myxedema

n.
  1. Nodules and plaques of mucoid edema of the skin, usually in the pretibial region, occurring in some patients with hyperthyroidism.pretibial myxedema
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.