关键词: 耳道, 慢性化脓性中耳炎, 中耳胆脂瘤, 内窥镜检查, 计算机扫描体层摄影术

Abstract:

Objective    To explore the significance of CT scan and endoscopy on the treatment of chronic suppurative otitis media. Methods    Clinical data of 35 patients （42 ear） suffering from chronic suppurative otitis media or middle ear cholesteatoma between January 2008 and Januaryr 2011 were reviewed.  Results of temporal bone CT scan and otoscopy were analyzed. Results        ①CT results of chronic suppurative otitis media could be divided into simple, sclerotic, granular  and mixed type.  Feature of middle ear cholesteatoma was the disappearance of ossicular chain or incudomalleolar joint and attic mesotympanum was occupied by soft tissue. Lateral semicircular canal bone, horizontal segment of the facial nerve canal and external auditory canal bone were destroyed in some cases. In simple type, incomplete mastoid gasification was noted.  In sclerotic type, sclerotic mastoid and similar bone shadow around the handle of malleus and stapes were prominent. CT results of granular type and mixed type were similar, in which the lesions involved the tympanic and mastoid, but not ossicular chain and facial nerve canal. ② Characteristic of otoscopy for chronic suppurative otitis media was the perforation of membrane tensa and eardrum calcification. For middle ear cholesteatoma,  perforation of shrapnell’s membrane, posterior superior quadrant and fall down of  the top wall of external auditory meatus, et al, could be identified. Conclusion    CT scan and otoscopy are important methods to assess the nature of the lesions, range, degree, and surgical options for chronic suppurative otitis media and middle ear cholesteatoma.

Key words: Cholesteatoma； Computed tomography, Endoscopy； Ear Canal, Chronic suppurative otitis media