Cholesteatoma Glossary

Canal wall down procedure

Description

a procedure where the bony partition between the back part of the ear canal and mastoid is removed

Canal wall up procedure

Description

a procedure where the bony partition between the back part of the ear canal and mastoid is kept intact

Congenital cholesteatoma

Description

a cholesteatoma that arises in an ear from squamous epithelium that became entrapped within the middle ear or petrous apex

Keratin

Description

a protein found in cells that form squamous epithelium

Mastoid

Description

the bone located directly behind the external ear which communicates with the middle ear

Mastoidectomy

Description

a procedure to remove part of the mastoid in order to clean out infection and remove cholesteatoma

Modified radical mastoidectomy

Description

a procedure where the bony partition between the back part of the ear canal and mastoid is removed and an ossicular reconstruction with repair of the eardrum is also performed

Ossicles

Description

the three bones behind the eardrum, namely the malleus, incus and stapes

Ossicular reconstruction

Description

a procedure to repair the ossicles so that sound transmission can occur to the inner ear

Petrous apex

Description

bone that is located deep to the inner ear

Petrous apex epidermoid

Description

a cholesteatoma that arises from squamous epithelium that became entrapped within the petrous apex

Radical mastoidectomy

Description

a procedure done where the eardrum, malleus, and incus are removed and the bony partition between the back part of the ear canal and mastoid is also removed.

Squamous epithelium

Description

skin

Tympanoplasty

Description

a procedure to repair the eardrum and the ossicles