Cholesteatoma

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
• Q
• R
• S
• T
• U
• V
• W
• X
• Y
• Z

Tympanic membrane

Cholesteatoma is a type of cyst located in the middle ear.

Cholesteatoma can be a birth defect (congenital), but it more commonly occurs as a complication of chronic ear infection.

Long-term swelling in the eustachian tube leads to negative pressure in the middle ear. This pulls a part of the eardrum (tympanic membrane) in the wrong way, creating a sac or cyst that fills with old skin cells and other waste material. The cyst becomes infected. The cyst may cause the some ear bones to waste away.

Review Date: 08/03/2006
Reviewed By: Alden J. Pearl, M.D., Clinical Assistant Professor, Department of Otolaryngology, State University of New York Health Science Center atBrooklyn, Brooklyn, NY. Review provided by VeriMed Healthcare Network.