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  • Title: Analysis of unilateral sclerotic temporal bone: how does the sclerosis change the mastoid pneumatization morphologically in the temporal bone?
    Author: Lee DH, Jung MK, Yoo YH, Seo JH.
    Journal: Surg Radiol Anat; 2008 May; 30(3):221-7. PubMed ID: 18246294.
    Abstract:
    BACKGROUND: Some disorders, such as otitis media and Eustachian tube dysfunction, may cause the temporal bone to become sclerotic. A sclerotic temporal bone has the tendency to shrink. The aim of this study was to evaluate the morphologic changes that result from sclerosis of the temporal bone. METHODS: We measured 9 variables on 2 axial images, and 8 variables on 2 coronal images in healthy ears and diseased ears in 37 patients with unilateral chronic otitis media. We also measured the volume of mastoid pneumatization. RESULTS: The distance from sigmoid sinus to Henle's spine was correlated to the degree of volume reduction, and it accounted for about 17.7% of the total variation in volume reduction. There was no difference in the sigmoid sinus type in comparisons between sclerotic and pneumatic mastoids. CONCLUSIONS: The sclerosis of the temporal bone was observed to reduce the volume of the mastoid pneumatization. However, a large portion of the volume reduction may result from the sclerotic change in the air cell system, rather than from shrinkage of the mastoid bone. Therefore, the location of surgically-important structures, in the middle and inner ear, is only rarely changed in sclerotic temporal bone.
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