external auditory canal


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external auditory canal

the passage leading inward through the tympanic portion of the temporal bone, from the auricle to the tympanic membrane; it consists of fibrocartilaginous outer and bony inner portions lined with thin skin medially and thicker skin with ceruminous glands, hair follicles, and subcutaneous fat laterally.

external auditory canal

n.
The passage leading inward through the tympanic portion of the temporal bone, from the external ear to the eardrum.

external auditory canal

n.

ex·ter·nal au·di·to·ry ca·nal

(eks-tĕrnăl awdi-tōr-ē kă-nal)
The passage leading inward through the tympanic portion of the temporal bone, from the auricle to the tympanic membrane; it consists of fibrocartilaginous outer and bony inner portions lined with thin skin medially and thicker skin with ceruminous glands, hair follicles, and subcutaneous fat laterally.
Synonym(s): acoustic meatus (2) .
References in periodicals archive ?
Caption: FIGURE 1: Otoscopy of the left external auditory canal. TMJ ganglion cyst (deflated) seen in the anterior inferior wall of the left external auditory canal.
Clinical findings include a mass in the external auditory canal and occasional otitis media.
Earwax also contributes to external auditory canal problems.
Osteomas of the temporal bone are rare tumors that are mostly observed in the external auditory canal, arising from the tympanic bone.
A biopsy was taken from all patients with granulations in the external auditory canal to exclude malignancy.
Intradermal nevus of the external auditory canal in a geriatric patient: Case report and literature review.
Matsumoto, "Chondroma of the bony external auditory canal attached to the short process of the malleus," International Journal of Pediatric Otorhinolaryngology, vol.
Mastoidectomy preserving the bony external auditory canal and tympanoplasty are referred to as closed technique or combined approach tympanoplasty that was first proposed by Sheehy and Janson,1,2 aiming to improve the classical mastoidectomy.
Keratosis Obturans (KO) is the accumulation of desquamated keratin appearing as large plug in the external auditory canal. It probably results from faulty migration of squamous epithelial cells which arise from the outer surface of tympanic membrane and from the skin of the adjacent part of bony external auditory canal, which becomes mixed with ear wax to form a thick plug.
Of the 1402 cases from Department of Otorhinolaryngology Head and Neck Surgery of Beijing Friendship Hospital, temporary facial nerve injury was noted in 4 (0.28%) cases, and injury to the posterior wall of the external auditory canal was reported in 14 (0.99%) cases.
Human wax is a mixture of desquamated keratinocytes secreted in outer third of the wall of external auditory canal, and sebaceous gland secretions, along with apocrine sweat glands.

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