Marañon's sign

[mär′ən-yōnz]
n.
  1. An indication of Graves' disease in which a vasomotor reaction occurs following stimulation of the skin over the throat.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.