Cholesteatoma: Difference between revisions
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==Background== | ==Background== | ||
*Commonly secondary to Eustachian tube dysfunction, which retracts TM | |||
*A retraction pocket forms and desquamating skin cells are trapped | |||
**Usually in "attic" involving pars flaccida | |||
**Their accumulation results in a slowly expanding mass | |||
**Sac of dead skin cells growing in middle ear on out of surface of TM | |||
*Can destroy ossicles and expand into mastoid (rarely, intracranially) | |||
*Often chronically infected with intermittent drainage | |||
==Clinical Features== | ==Clinical Features== | ||
Revision as of 14:43, 19 October 2018
Background
- Commonly secondary to Eustachian tube dysfunction, which retracts TM
- A retraction pocket forms and desquamating skin cells are trapped
- Usually in "attic" involving pars flaccida
- Their accumulation results in a slowly expanding mass
- Sac of dead skin cells growing in middle ear on out of surface of TM
- Can destroy ossicles and expand into mastoid (rarely, intracranially)
- Often chronically infected with intermittent drainage
Clinical Features
Differential Diagnosis
Ear Diagnoses
External
- Auricular hematoma
- Auricular perichondritis
- Cholesteatoma
- Contact dermatitis
- Ear foreign body
- Herpes zoster oticus (Ramsay Hunt syndrome)
- Malignant otitis externa
- Otitis externa
- Otomycosis
- Tympanic membrane rupture
Internal
- Acute otitis media
- Chronic otitis media
- Mastoiditis