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.

external auditory canal, external auditory meatus

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 ?
CONCLUSION: Ceruminous adenomas are rare benign glandular tumor of external auditory canal of ceruminous gland origin.
It was located in the subcutaneous tissue of the posterior external auditory canal (figure 2).
The three most common indications for Thiersch grafting are for skin repair following (1) a canalplasty for the treatment of congenital external auditory canal atresia or intractable otitis externa, (2) a canal-wall-down mastoidectomy, and (3) a tympanoplasty with a moderate to large canalplasty.
The tumour was found to fill the external auditory canal, mastoid antrum, middle ear and extending in to the petrous apex.
DISCUSSION: MOE is a term first coined by JR Chandler in 1968 to describe the severity of the infection of external auditory canal (1).
Recurrent hemangioma of the external auditory canal.
When metastases do occur, they are most commonly found in the petrous portion (35% of cases), the internal auditory canal (17%), the mastoid (8%), and the external auditory canal (8%).
Based on our experience with this case, we conclude that early bacterial culture and staining for acid-fast bacilli in ear drainage material or granulation tissue should be performed when standard antimicrobial therapy fails to eradicate chronic otitis media of an undetermined origin that is accompanied by granulation tissue over the external auditory canal or middle ear.
To ensure the external auditory canal was completely sealed during test, ER-10C probe was connected to a proper rubber earplug and then with amplifier and DSP plate through wires for operation.
Posterior dislocations occur as a result of direct blow to chin and condyle pushed posteriorly towards the mastoid causing damage to the external auditory canal.
Note the zygomatic arch and external auditory canal are preserved.
OBJECTIVE: To describe the clinical manifestations of external auditory canal (EAC) cholesteatoma and evaluate the surgical outcomes of reconstruction using an inferior pedicled soft-tissue periosteum flap.

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