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1, External auditory canal cholesteatoma is a rare disease entity.

2, Osteomas of the external auditory canal are benign abnormal growth of bone which develops as semi-spherical or pedunculated masses beneath the skin of the canal and can often cause obstruction.

3, Methods Anatomic observation on arachnoid membrane in internal auditory canal in cadaver and operative observation on relationship among tumor, arachnoid membrane and nerve.

4, Sound waves reach the eardrum through the external auditory canal, tympanic membrane caused by vibration.

5, Osteomas occur in the external auditory canal in two forms; multiple compact osteomas or so called " exostosis " and single cancellous osteomas.

6, In skin of external auditory canal , there are multilayer applanation - keratinocyte, epidermis, collagen fibrils, collagenoblast and leukomonocyte.

7, The external auditory canal makes a slightly S - shaped curve.

8, The skin of the auditory canal contains many sebaceous glands and modified apocrine (ceruminal) glands and variable numbers of hair follicles.

9, Objective:To observe the effect of patients with external auditory canal otomycosis treated with alkaline solution ear bath and microwave irradiation.

10, Methods:A total of 59 patients with external auditory canal otomycosis were randomly divided into test and control group.

11, Furuncles of the auditory canal should be allowed to resolve.

12, Otitis externa is dermatitis, usually bacterial,[http://sentencedict.com/auditory canal.html] of the auditory canal and sometimes the external ear.

13, Frequency equalisation compensates for the sound passing through the auditory canals.

14, Conclusion: The hiatus of canal for greater petrosal nerve and arcuate eminence are important landmarks to defined internal auditory canal.

15, Methods: To summarize retrospectively the clinical data of 3 cases with adenoid cystic carcinoma auditory canal.

16, The vestibular neurectomy was as performed as possible by exposing the internal auditory canal for the sake of preserving hearing.

17, Conclusion For reserving hearing in vestibular neurectomy, it is better to choose the apprach of exposing internal auditory canal.

18, The outer ear includes the ear lobe and external auditory canal, which funnels sound waves toward the eardrum (or tympanic membrane) allowing it to vibrate.

19, Objective To provide the anatomic foundation for dorsoventral X - ray photographs internal auditory canal.

20, Single cancellous osteomas, unlike exostosis , are a relatively rare lesion in the external auditory canal.

21, MethodsRetrospective analysis of 13 cases of surgically treated malignant tumors of ceruminous glands of external auditory canal.

22, To evaluate the application of endoscope in acoustic neuroma resection in internal auditory canal ( IAC ).

23, The principal diagnostic examination is pantopaque cisternography of the internal auditory canal other than clinical features and audiology.

24, Methods Retrospective analysis of 13 cases of surgically treated malignant tumors of ceruminous external auditory canal.

25, ObjectiveTo investigate the clinical characteristics and therapeutic results of malignant tumors of ceruminous glands of external auditory canal.

26, Objective To provide the anatomic foundation for dorsoventral X-ray photographs of internal auditory canal.

27, ObjectiveTo investigate the clinical characteristics and therapeutic results of malignant tumors of ceruminous external auditory canal.

28, We suggested that the rear boundary of the routine preauricular field should be extended to the back fringe of external auditory canal 12 centimetres.

29, Objective:To reconstruct middle ear structure for open mastoid antrum with external auditory canal after radical mastoidectomy in one-stage.

30, Objective To introduce the related and operative localization of internal auditory canal by fossae cranio media.