paraganglioma

[păr′ə-găng′glē-ōmə]
n.
  1. A tumor usually derived from the chromoceptor or chromaffin tissue of a paraganglion or the medulla of the adrenal gland.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.