cholesteatoma


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cholesteatoma

 [ko″le-ste″ah-to´mah]
a cystlike mass with a lining of stratified squamous epithelium, filled with desquamating debris frequently including cholesterol. Cholesteatomas are most common in the middle ear and mastoid region secondary to trauma or infection that undergoes faulty healing so that epithelium invaginates.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

cho·les·te·a·to·ma

(kō'les-tē'ă-tō'mă),
1. Squamous metaplasia or extension of squamous cell epithelium inward to line an expanding cystic cavity that may involve the middle ear or mastoid, erode surrounding bone, and become filled with a mass of keratinized squamous cell epithelial debris, usually resulting from chronic otitis media. The lesion often contains cholesterol clefts surrounded by inflammatory and foreign body giant cells, hence the name cholesteatoma.
2. An epidermoid cyst arising in the central nervous system in humans or animals.
[cholesterol + G. stear (steat-), tallow, + -ōma, tumor]
Farlex Partner Medical Dictionary © Farlex 2012

cholesteatoma

Dermatology
A benign plug of keratinised squamous epithelium and cholesterol found in the middle ear after acute otitis media.
 
Clinical
Hearing loss, ear fullness, and pain.
 
Neuropathology
Epidermoidoma, see there.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

cholesteatoma

Dermatology A benign plug of keratinized squamous epithelium and cholesterol in the middle ear post acute otitis media Clinical Hearing loss, ear fullness, pain
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

cho·les·te·a·to·ma

(kō'lĕ-stē'ă-tō'mă)
1.A mass of keratinizing squamous epithelium and cholesterol in the middle ear, usually caused by chronic otitis media, with squamous metaplasia or extension of squamous epithelium inward to line an expanding cystic cavity that may involve the mastoid and erode surrounding bone.
2. An epidermoid cyst arising in the central nervous system in humans or animals.
[cholesterol + G. stear (steat-), tallow, + -ōma, tumor]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

cholesteatoma

A tumour-like mass of cells, shed by the outer layer of the skin of an infected eardrum, which relentlessly invades the middle ear through a perforation in the drum, to cause serious internal damage. The condition was once often fatal but advances in microsurgical management with radical clearance of all disease tissue and the use of fibrin glue and bone paté have greatly improved the outlook.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

Cholesteatoma

A cystic mass of cells in the middle ear, occurring as a congential defect or as a serious complication of a disease or traumtic condition of the ear.
Mentioned in: Ear Surgery, Mastoidectomy
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

cho·les·te·a·to·ma

(kō'lĕ-stē'ă-tō'mă)
A mass of keratinizing squamous epithelium and cholesterol in the middle ear, usually caused by chronic otitis media, with squamous metaplasia or extension of squamous epithelium inward to line an expanding cystic cavity that may involve the mastoid and erode surrounding bone.
[cholesterol + G. stear (steat-), tallow, + -ōma, tumor]
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about cholesteatoma

Q. Is cholesteatoma a form of cancer? My ear Doctor diagnosed me with cholesteatoma. I am very scared. Does this mean I have cancer? Can I die from this?

A. Cholesteatomas are not a form of cancer. They are benign tumors. They can destroy the bones of hearing as they grow, especially when the ear is infected or if water gets into the middle ear with other infections.
Cholesteatomas are not life threatening but should be treated since they can cause complications if are not treated. If not treated, cholesteatomas will eventually erode the bone leading into the inner ear. This can cause nerve loss and deafness as well as severe imbalance and dizziness. The thin plate of bone that separates the roof of the ear from the brain can also be eroded by cholesteatomas. This exposes the covering of the brain. In extreme situations, it can lead to brain infection and other severe complications.

More discussions about cholesteatoma
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References in periodicals archive ?
A comparison of patterns of disease extension in keratosis obturans and external auditory canal cholesteatoma. Otol Neurotol 2013; 34: 91-4.
Although various factors affecting the hearing outcomes of tympanoplasty have been reported [5-17], to the best of our knowledge, no study has investigated the favorable prognostic factors for hearing outcomes of ossiculoplasty for middle ear cholesteatoma based on standardized staging and classification criteria.
The study was Retrospective descriptive study of endoscopic cholesteatoma surgeries done in 243 ears in a duration of eight years from 2009 to 2017.
Perhaps the best-described application for endoscopic ear surgery has been cholesteatoma removal.
Congenital cholesteatoma and cholesterol granuloma of the temporal bone: role of magnetic resonance imaging.
In case of cholesteatoma with eroded incus, we used a remodeling head of malleus (5/37) and mastoid cortex bone (8/37) for the collumela effect.
Tos has classified EACC based on pathogenetic theories into (1) primary EACC, (2) secondary EACC, and (3) cholesteatoma associated with congenital atresia of the ear canal [9].
Intraoperatively, the right middle ear, the mastoid bone, the sigmoid sinus, and the bulbus venae jugularis were completely obstructed by cholesteatoma, causing a bone defect in the sigmoid sinus, and the facial nerve was completely open in the tympanic and mastoid segments (Figure: C).
[2] assessed hearing results 3 to 9 months postoperatively in children treated for cholesteatoma and chronic otitis media.
In case 5, the patient affected with cholesteatoma, the age of development, was, as expected, in infancy.
Results: Cholesteatoma was present in 48 (61%) cases.
granulation tissues, cholesterol granuloma, tympanosclerotic focus and adhesive tissues) in 51 ears and restricted cholesteatoma in 30 ears.