A cholesteatoma is an abnormal collection of skin cells that grows in the middle ear behind the eardrum. Although benign, cholesteatomas can be destructive if left untreated (gradually eroding surrounding structures, including the bones of the middle ear and the skull base). This condition may develop after repeated ear infections or occur due to poor Eustachian tube function. Early diagnosis and intervention are critical to prevent long-term complications such as hearing loss, dizziness, or facial nerve damage.
Causes of Cholesteatoma
Cholesteatomas typically form as a result of chronic ear problems or structural abnormalities. Common causes include:
- Eustachian Tube Dysfunction: Poor ventilation of the middle ear creates negative pressure that pulls part of the eardrum inward, forming a pocket that traps skin and debris.
- Recurrent Ear Infections: Ongoing inflammation can contribute to the formation of cholesteatomas.
- Congenital Cholesteatoma: Rarely, cholesteatomas are present at birth due to abnormal embryonic development.
- Perforated Eardrum or Surgery: Injuries or procedures involving the eardrum may create an entry point for skin cells to accumulate abnormally.
Symptoms of Cholesteatoma
Symptoms often develop gradually and may include:
- Persistent or foul-smelling ear drainage (otorrhea)
- Hearing loss in the affected ear
- Fullness or pressure in the ear
- Tinnitus (ringing or buzzing)
- Dizziness or balance issues
- Ear pain (less common unless infection is present)
- Facial weakness (in advanced cases affecting the facial nerve)
Diagnosis
A diagnosis of cholesteatoma requires a thorough evaluation by an otolaryngologist. Diagnostic steps may include:
- Otoscopy: Visual inspection of the ear may reveal a retraction pocket, debris, or perforation.
- Audiometry: Hearing tests to determine the extent of conductive hearing loss.
- CT Scan of the Temporal Bone: High-resolution imaging helps determine the size, location, and extent of bone erosion.
- MRI (in select cases): May be used to assess soft tissue involvement or monitor for recurrence after surgery.
Treatment Options
Cholesteatomas do not resolve on their own and typically require surgical removal to prevent complications. Treatment approaches may include:
- Surgical Removal (Tympanomastoidectomy): The primary treatment to remove the growth and reconstruct damaged middle ear structures. The goal is complete removal and preservation of hearing when possible.
- Ongoing Monitoring: Follow-up imaging and exams are essential to detect recurrence, especially in cases with aggressive disease.
- Hearing Rehabilitation: In some cases, additional surgery or hearing aids may be necessary to address long-term hearing loss.
- Topical or Oral Antibiotics: Used temporarily to treat active infection or discharge before surgery.
When to See a Specialist
Persistent drainage from the ear, worsening hearing, or a sense of pressure should prompt evaluation by an ENT specialist. Early intervention can prevent serious complications such as bone erosion, permanent hearing loss, facial paralysis, or infection spreading to the brain. With appropriate surgical treatment and follow-up care, most patients experience excellent outcomes.