meatus

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Related to auditory meatus: External Auditory Meatus

meatus

[mē′ād·əs]
(anatomy)
A natural opening or passage in the body.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Under general anesthesia, the skin was incised circumferentially at 1 cm from tumor macroscopic borders, including the anterior region of the helix, tragus, partially the lobule of ear and the anteroinferior part of the external auditory meatus. The deep lobe of the parotid was excised en bloc with the facial nerve, due to tumor invasion.
Regarding the hearing loss and tinnitus, there was no remarkable response, and the explanation could be related to pressure due to pathology that cause an enhancing lesion in the internal auditory meatus involving the 7th-8th nerve complex most likely acoustic neuroma.
The main reasons the nerve sizes could not be measured adequately were movement artifact and nerve clustering in the internal auditory meatus or adherence to the walls of the IAMs, so the nerve could not be reliably separated from other structures with sufficient amount of surrounding CSF.
(A) Tumor in the left facial nerve, approximately 1.0cm in diameter, located at the entrance of the internal auditory meatus. Inset: cerebellar and brainstem herniation.
On examination, no wound was found in the neck and the external auditory meatus was packed, with no active bleed.
Further, high-resolution axial CT scan revealed a dilatation of the lateral end of the internal auditory meatus and a deficit or absence in the basal turn of the cochlea [Figure 1].{Figure 1}
A 65-year-old female presented with mass in the external auditory meatus (laterality not mentioned).
However, this auricular region is supplied not only by ABVN, but also by the auriculotemporal nerve and contributions of the glossopharyngeal [22], facial [23], and cervical nerves (lesser occipital nerves and auricularis maior) [24-26]; importantly, all these nerves contribute to the innervation of the external auditory meatus and external auditory canal, and only the cymba conchae is regarded to be exclusively innervated by ABVN [27].
Abstract: A 28-year-old female Congo African grey parrot (Psittacus erithacus erithacus) was evaluated because of a mass in the left external auditory meatus. Results of a computed tomography scan revealed an osteolytic left hemimandibular mass with irregular bone production and a soft tissue mass in the left external auditory meatus.
After thorough examination of aural canal, the animal was positioned in lateral recumbency and swab was placed at external auditory meatus to prevent haematoma draining into ear canal.
In some of our cases (n=7), soft tissues occupied all spaces at the time of CT study with antral expansion, abutting the ossicular chain and bulging into the external auditory meatus. These patients were considered as having equivocal features with possibility of CSOM and + possibility of associated cholesteatoma.
"This time we could not get clear surgical margins, and the tumor was approaching the external auditory meatus. Surgery was abandoned due to fears of complications to that area," she said.