EVALUATE FEATURES OF MASTOID BONE IMAGES ON TEMPORAL BONE CT SCAN IN PATIENTS WITH NON- CHOLESTEATOMA CHRONIC OTITIS MEDIA

Abstract

Background: Recognizing and evaluating precisely the injuries in mastoid bone are important, so that we can choose a better surgical operation or other treatment for the patients. Temporal bone CT scan is a popular and effective instrument for supporting the physicians.

Objectives: We want to evaluate some clinical features, oto-endoscope images and pathology changes in non cholesteatoma chronic otitis media patients.

Methods: A cross sectional, descriptive study on 76 patients with non cholesteatoma chronic otitis media, diagnosed from 2020-2021 at Tai Mũi Họng TP. HCM hospital.

Results: There are 95 ears. Most of hearing losses are mild (46.3%). The prevalence of tympanic membrane perforation is 73.7%, most perforations are usually seen in the center of the tympanic membrane (74.3%) and non-marginal (62.9%), the sizes of perforations are diversified. On CT, 56.8% of samples are the sclerotic mastoids, temporal bones with bad pneumatization are dominant (68.4%), 58.9% of damage images are total opacification. We found a correlation of temporal bone pneumatization and the damage images on CT scan (p <0.001). Besides, the damge images related with the margination of tympanic perforation (p=0.008).

Conclusions: Chronic otitis media patient often has mild hearing loss, perforated tympany membrane and bad mastoid bone pneumatization. Pneumatization of temporal bone was negatively correlated to the severity of injury in mastoid bone.

Keywords: chronic otitis media, oto-endoscope, mastoid bone CT scan