H60.4 – Cholesteatoma of the External Ear
H60.4 is the ICD-10 code for cholesteatoma of the external ear – a rare accumulation of squamous epithelium in the outer ear canal that can lead to bone erosion.
Things worth knowing about "H60.4"
H60.4 is the ICD-10 code for cholesteatoma of the external ear – a rare accumulation of squamous epithelium in the outer ear canal that can lead to bone erosion.
What is H60.4 – Cholesteatoma of the External Ear?
The ICD-10 code H60.4 refers to cholesteatoma of the external ear, a rare but clinically significant condition affecting the outer ear canal. It involves an abnormal accumulation of keratinizing squamous epithelium (skin tissue) that grows into the bony ear canal and, through enzymatic activity, can cause progressive local bone erosion. Unlike the more common middle ear cholesteatoma, this form is primarily confined to the external auditory canal.
Causes
The exact causes of external ear cholesteatoma are not always clearly established. The following factors are discussed:
- Chronic irritation or inflammation of the ear canal (e.g., recurrent otitis externa)
- Trauma or injury to the ear canal, such as from foreign objects or improper ear cleaning
- Congenital or acquired disorders of skin migration within the ear canal
- Periostitis (inflammation of the bone lining) as a contributing factor
Symptoms
Cholesteatoma of the external ear may present with the following symptoms:
- Ear pain (otalgia), often deep and persistent
- Ear discharge (otorrhea), which may have an unpleasant odor
- Sensation of pressure or fullness in the ear
- Hearing loss due to blockage of the ear canal
- In advanced cases: dizziness or neurological symptoms if spread to adjacent structures occurs
Diagnosis
Diagnosis is typically made by an ENT (ear, nose and throat) specialist using:
- Otoscopy: direct visualization of the ear canal with an otoscope; whitish, keratin-filled masses are typically visible
- Microscopy of the ear canal for detailed assessment of the extent of the lesion
- Computed tomography (CT) of the temporal bone to evaluate bone erosion and extent of spread
- Histological examination after biopsy to confirm the diagnosis
Treatment
Treatment of external ear cholesteatoma is generally surgical:
- Surgical removal: complete excision of the cholesteatoma is the treatment of choice to prevent recurrence and further bone destruction
- Canal wall reconstruction: in cases of extensive bone erosion, plastic reconstruction of the ear canal may be necessary
- Antibiotic therapy: for accompanying bacterial infection, pre- or postoperatively
- Regular follow-up: long-term ENT monitoring is essential for early detection of recurrence
Prognosis
When detected early and completely removed surgically, the prognosis is generally favorable. However, there is a risk of recurrence, so regular follow-up examinations are recommended. If left untreated, cholesteatoma can lead to serious complications such as hearing loss, facial nerve paralysis, or intracranial infections.
References
- World Health Organization (WHO): ICD-10 – International Statistical Classification of Diseases and Related Health Problems, 10th Revision. Chapter VIII: Diseases of the Ear and Mastoid Process (H60–H95). WHO, Geneva.
- Fisch U, May J, Linder T: Tympanoplasty, Mastoidectomy and Stapes Surgery. 2nd ed. Thieme, Stuttgart 2008.
- Holt JJ: Ear canal cholesteatoma. Laryngoscope. 1992;102(6):608–613. PubMed PMID: 1602252.
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