• Title, Summary, Keyword: External auditory canal

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A Large Schwannoma of the External Auditory Canal with Adjacent Bony Erosion

  • Han, Seung Yoon;Yoon, Jin
    • Journal of Clinical Otolaryngology
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    • v.29 no.2
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    • pp.250-253
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    • 2018
  • Schwannomas originating from the external auditory canal are relatively uncommon whereas they are commonly found in head and neck region. The authors recently experienced a 18-year-old male with a large mass in his right side external auditory canal. The mass was reported as a schwannoma and after the local excision, no symptom or sign of recurrence was identified. We report the case with literatures.

The comparison of the voice between the free field and the external auditory canal (음장과 외이도 내부에서의 음성 비교)

  • Heo, Seung-Deok;Kim, Lee-Suk;Ko, Do-Heung;Lee, Jung-Hak
    • Speech Sciences
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    • v.7 no.4
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    • pp.83-90
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    • 2000
  • The purpose of this study was to examine some acoustic characteristics in the ear canal. It was assumed that a sound outside the external auditory canal could be different from the sound inside the external auditory canal. The acoustic signals were captured by a probe microphone placed at a distance within 1 cm from the tympanic membrane, and a reference microphone was placed over the upper pinna. Three vowels /a/, /i/, /u/ were recorded from a normal adult male speaker. The parameters such as the formant frequency ($Fl\simF5$) and the peak intensity were measured using a speech analyser, PCquirer. It was found that the entering part of the external auditory canal functions as a narrowing point as to the speech that passes through the free field. Results show that acoustic characteristics were changed for speech discrimination rather than speech perception.

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Utilizing Pedicled Muscle Flap for Defect Coverage after External Auditory Canal Cancer Resection (외이도에 발생한 악성종양에서 유경근육피판을 이용한 결손 재건)

  • Lee, Kangwoo Nathan;Kim, Eun Key
    • Archives of Craniofacial Surgery
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    • v.12 no.1
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    • pp.37-42
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    • 2011
  • Purpose: Cancer arising from the external auditory canal is a rare disease. A lesion that seems harmless in someway, can be lethal when inadequately excised, the tumor may infiltrate nerves, the parotid and auditory tissues before re-invading the skin. Wide resection of the lesion surrounding the structure and reconstruction with an adequate plan is crucial for the treatment of this disease. Methods: Two patients with external auditory canal cancer were treated with muscle flaps and skin grafts. Lateral temporal bone resection (LTBR) was performed for complete resection of the cancer. The defect cavity was obliterated with highly vascularized tissue using pedicled sternocleidomastoid muscle, and temporalis muscle individually, combined with full thickness skin graft for covering the skin defect of the ear. Results: Clear resection margin was obtained, and both patients showed disease free survival during the follow up. There was no complications of hematoma, infection, flap loss, or wound problem in both patients. Both patient received radiation therapy, there was no osteoradionecrosis or any other complication related to radiation therapy. Conclusion: Utilizing pedicled muscle flaps for managing defects after wide resection of the external auditory canal cancer is an effective method for managing this difficult disease.

The Recurrence Pattern of Primary External Auditory Canal Cancer (원발성 외이도암의 재발 양상)

  • Heo, Jaesung;Oh, YOung-Taek;Choung, Yun-Hoon;Kim, Chul-Ho;Shin, Yoo-Seob
    • Korean Journal of Head & Neck Oncology
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    • v.33 no.1
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    • pp.15-19
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    • 2017
  • Background/Objective: The survival and recurrence pattern of the patients with primary cancer of the external auditory canal was evaluated. Materials & Methods: Seventeen patients with primary cancer of the external auditory canal from 2002 to 2013 was analyzed retrospectively. Overall survival, recurrence free survival, local recurrence free survival and distant metastasis free survival was calculated by Kaplan-Meyer's method. Results: Five year overall survival rate, 5 year recurrence free survival rate, 5 year local recurrence free survival rate and 5 year distant metastasis free survival rate were 49.3% 54.9%, 64.7% and 69.6% respectively. The recurrence pattern is different to the pathologic type, squamous cell carcinoma or adenoid cystic carcinoma. The patients with squamous cell carcinoma showed local recurrence and the patients with adenoid cystic carcinoma showed distant metastasis mainly. Conclusion: Primary cancer of external auditory canal showed different clinical course depend on the pathologic diagnosis.

Anterior tympanic plate fracture following extraction of the lower molar

  • Kim, Yeon-Ho;Kim, Moon-Key;Kang, Sang-Hoon
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.42 no.1
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    • pp.51-54
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    • 2016
  • The present case report describes an external auditory canal injury following extraction of the lower molar. The external auditory canal was torn in the same fashion that occurs in an anterior tympanic plate fracture. This case demonstrates one of the rare complications associated with dental extractions.

Osteoma of the External Auditory Canal (외이도에 발생한 골종)

  • 이양선;박윤이
    • Proceedings of the KOR-BRONCHOESO Conference
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    • pp.17.1-17
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    • 1983
  • Osteomas of the external auditory canal are considered clinically to be discrete, pedunculated bone lesions arising along the tympanosquamous suture. They are benign lesions but often are slowly progressive growth in size which eventually resulted in obstruction of the external auditory canal when this occurs the patient will complain of deafness. Exostoses, similar to the osteoma, are broad based elevations of bone usually multiple and bilaterally symmetric, involving the tympanic bone. Recently, the authors have experienced a case of osteoma of the external auditory canal, and so report with some reviews of the literatures.

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A Case of Ceruminous Adenoma Arising from the External Auditory Canal

  • Yeo, Seong-Chul;Lee, Ho Joong;Kim, Jin Yong;Kim, Dae Whan;Seo, Jin Hyun;Ahn, Seong-Ki
    • Kosin Medical Journal
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    • v.33 no.2
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    • pp.228-234
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    • 2018
  • Ceruminous adenoma is a benign neoplasm of the ceruminous gland, and its development in human external auditory canal is very rare. Due to the limited number of cases, controversy still exists about nomenclature, classification, diagnosis and its treatment. Recently we experienced a 55 years old woman who was diagnosed with ceruminous adenoma of the external auditory canal, and who was treated with wide excision. So we report this uncommon case in combination with a review of the literature.

A Case of Hemangioma in the External Auditory Canal with Pulsatile Tinnitus (박동성 이명으로 발현된 외이도 혈관종 1예)

  • Kim, Hyeonseok;Seo, Jinwon;Lee, Hyo-Jeong
    • Korean Journal of Otorhinolaryngology-Head and Neck Surgery
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    • v.60 no.3
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    • pp.140-143
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    • 2017
  • Hemangiomas are relatively common in the head and neck region, but their occurrence in the temporal bone are extremely rare. The hemangioma of the external auditory canal (EAC) is a rare otologic entity as only 22 cases of hemangioma of the EAC have been reported worldwide. Here we report a patient presenting with pulsatile tinnitus, which turned out to be caused by capillary hemangioma arising from the posterior medial portion of external auditory canal touching the tympanic membrane. Surgical excision of the tumor was successful. The clinical manifestations and management of benign vascular lesions of the EAC are discussed with a review of literature.

A Case of Schwannoma of the External Auditory Canal (외이도에 발생한 신경초종 1예)

  • Han, Young-Jin;Hong, Jong-Chul;Kim, Woo-Sung;Lee, Hwan-Ho
    • Korean Journal of Head & Neck Oncology
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    • v.23 no.2
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    • pp.195-198
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    • 2007
  • Schwannoma is a slow-growing benign tumor of neurogenic origin. The lesion is derived from the Schwann cells surrounding neural tissue. It can grow in almost all regions of the body. Schwannoma of the external auditory canal is a rare finding. Recently, we experienced schwannoma of the external auditory canal of a 29-year-old female who had surgical removal completely and verified histopathologically as schwannoma.