malacoplakia

[măl′ə-kō-plākē-ə]
n.
  1. A rare lesion in the mucosa of the urinary bladder, characterized by mottled yellow and gray soft plaques and nodules that consist of numerous macrophages and calcospherites.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.