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 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.

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

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

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

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

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

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

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

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

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