pinealoma

[pĭn′ē-ə-lōmə, pī′nē-]
n. pl. pin•e•a•lo•mas
  1. A neoplasm derived from the pineal body and characterized by large, round, or polygonal cells with large nuclei and small cells that resemble lymphocytes.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.