![]() It collects sound waves and channels them into the ear canal (external auditory meatus), where the sound is amplified. T1 tumors of the bony ear canal and T2 tumors (i.e., those with limited bony or soft tissue involvement) are best controlled with lateral temporal bone resection. The auricle (pinna) is the visible portion of the outer ear. This operation must be selected for limited tumors that do not cross medially over the bony-cartilaginous junction. external acoustic meatus) stretches from the base of the concha to the tympanic membrane and measures about 24 millimeters along its posteriorwall. Small T1 tumors that are confined to the soft tissues, cartilaginous ear canal can be removed with wide local excision, where the skin of the ear canal and the underlying cartilage are removed with frozen section medial margins. Early stage tumors can be managed with a surgery alone reserving radiation as a component of salvage options. The external ear consists of a pinna and an external auditory meatus, and channels sound to the tympanic membrane. Gidley 8) reviewed several literatures and discussed about treatment strategies focused on the carcinoma of EAC. The external auditory canal is a slightly curved tube that extends inward from the floor of the concha and ends blindly at the tympanic membrane. In the several studies, authors disagree about the extent of surgery and the role of radiotherapy and chemotherapy in managing these tumors. Therefore, the management of these tumors is difficult. No tumor recurrence or complication was noted in the first postoperative year.īecause of the rarity of malignant tumor of EAC, there are no randomized clinical trials. The tympanic membrane (eardrum) is an oval, semi-transparent structure situated between the external auditory meatus and the tympanic cavity of the middle ear. The patient was treated with a sleeve resection of the EAC with a safety margin reconstructed with a split-thickness skin graft. Recently we experienced a case of basal cell carcinoma in the EAC, confined in the cartilaginous portion of EAC, presenting with intermittent otorrhea for several years. But basal cell carcinoma, known to be less aggressive tumor, can be removed with a minimal safety margin and have better treatment results. Due to the rarity of malignant tumor of EAC, there is no widely accepted treatment modality yet. Pathologically, squamous cell carcinoma is incidentally most common, and adenoid cystic carcinoma, basal cell carcinoma, and melanoma follow in decreasing order. 2015 18(2):E229–E236.Malignant tumor originated from external auditory canal (EAC) is very rare with an annual incidence of around 1 per million. Management of pain secondary to temporomandibular joint syndrome with peripheral nerve stimulation. Rodriguez-Lopez MJ, Fernandez-Baena M, Aldaya-Valverde C. It does not play an essential role in audition, which is proved by the fact that the removing of the pinna does not substantially damage our auditory capacity. The auricle is the only visible part of the ear, constituting its outermost part, the segment of the organ projecting outside the skull. Refractory facial pain attributed to auriculotemporal neuralgia. and the auditory meatus or the outer ear canal. Stuginski-Barbosa J, Murayama RA, Conti PC, Speciali JG. Functional anatomy of the mandibular nerve: consequences of nerve injury and entrapment. This disambiguation page lists articles associated with the title Auditory meatus. Associated Conditions and Treatments As with any nerve, the auriculotemporal nerve can be impaired by traumatic damage (injury to the area it runs through) or diseases that impact nerves (i.e. Piagkou M, Demesticha T, Skandalakis P, Johnson EO. Auditory meatus can refer to: external auditory meatus. External auditory meatus branch: Innervates the forward external portion of the outer ear (external meatus) and the eardrum (tympanic membrane). The majority of these scans report a normal internal auditory meatus, with an incidental finding other than a vestibular schwannoma much more likely to be present. ![]() Parotid branches of the auriculotemporal nerve: An anatomical study with implications for Frey syndrome. An increasing number of MRI scans are being requested for patients presenting with unilateral audiovestibular symptoms, in order to rule out internal auditory meatus lesions. ![]() Anatomical study of the superficial temporal branches of the auriculotemporal nerve: Application to surgery and other invasive treatments to the temporal region. Iwanaga J, Watanabe K, Saga T, Fisahn C, Oskouian RJ, Tubbs RS. The origin of the auriculotemporal nerve and its relationship to the middle meningeal artery. ![]()
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