cholesteatoma
(redirected from margaroid tumour)Also found in: Dictionary, Medical.
cholesteatoma
[kə‚les·tē·ə′tō·mə] (medicine)
An epidermal inclusion cyst of the middle ear, or mastoid bone, sometimes in the external ear canal, brain, or spinal cord. Also known as pearly tumor.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.