Canadian Medical Guide > Diseases > Otorhinolaryngologic Diseases > Ear Diseases Terms and Definitions

Ear Diseases

Medical Definition:	Diseases of the ear, general or unspecified.
Guide Notes:	GEN only; NIM with coord for diseases of specific parts; /diag: consider also DIAGNOSTIC TECHNIQUES, OTOLOGICAL; inflamm dis = OTITIS and its specifics

Ear Diseases Categories.

	Cholesteatoma, Middle Ear - Cholesteatoma of the middle ear, usually associated with chronic infection, and commonly affecting the tympanum, epitympanum, and antrum.
	Ear Deformities, Acquired - Distortion or disfigurement of the ear caused by disease or injury after birth.
	Earache - Pain in the ear.
	Hearing Disorders - Conditions that impair the transmission or perception of auditory impulses and information from the level of the ear to the temporal cortices, including the sensorineural pathways.
	Labyrinth Diseases
	Otitis - Inflammation of the ear, which may be marked by pain, fever, abnormalities of hearing, hearing loss, tinnitus, and vertigo. Inflammation of the external ear is OTITIS EXTERNA; of the middle ear, OTITIS MEDIA; of the inner ear, LABYRINTHITIS. (From Dorland, 27th ed)
	Otosclerosis - The formation of spongy bone in the labyrinth capsule. The ossicles can become fixed and unable to transmit sound vibrations, thereby causing deafness.
	Retrocochlear Diseases - Diseases of the VESTIBULOCOCHLEAR NERVE. Retrocochlear refers to the eighth cranial nerve and cerebellopontine angle as opposed to the cochlea. (Dorland, 28th ed)
	Tympanic Membrane Perforation - An opening in the tympanic membrane usually caused by trauma. There are four general categories: compression injuries (the most common and usually the result of a blow to the ear); instrumentation injuries (the second most common, usually inadvertent, caused often by cotton swabs or bobby-pins); burn-slag injuries (frequently seen in industry, from hot metal from machines or welding); and blast injuries (usually seen during war or as a result of terrorist bombing). In the absence of infection, most traumatic tympanic membrane perforations heal spontaneously. Persistent perforation is usually a manifestation of tubotympanitis, an inflammation of the eustachian tube and tympanic cavity (middle ear). (From Paparella, Shumrick, Gluckman, and Meyerhoff: Otolaryngology, vol. II, 3d ed, pp1363-65)

Ear Diseases Medical Definitions and Terms

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