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Otolaryngology - Head & Neck Surgery
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How is cholesteatoma diagnosed?

The diagnosis in the early stage of the disease is based on a detailed ear exam including visualization of the cholesteatoma by an otoscope (magnifying glass) or a microscope. Hearing tests (audiograms) and CT scans are the supporting tests that define the degree of impairment and the extent of the disease.

The below images illustrate a small and large cholesteatoma, with increasing degrees of complexity and damage to the temporal bone of the skull:

small cholesteatoma (arrow)


Figure 1: small cholesteatoma (arrow)

Large cholesteatoma with a fistula in the lateral semicircular canal


Figure 2: large cholesteatoma (CH) with a fistula (arrow) in the lateral semicircular canal

Location and contact

Department of Otolaryngology

Sunnybrook Health Sciences Centre
2075 Bayview Avenue,
M-wing, 1st floor, room M1 102
Toronto, ON M4N 3M5

Hours: Mon-Fri, 8:00 a.m. - 4:30 p.m.

Phone numbers »

Otolaryngology Clinic:
416-480-4138

Audiology:
416-480-4143

Hearing Aid:
416-480-4997

Cochlear Implant:
416-480-6751

Fax »

416-480-5761

Referral forms »