断層撮影法による真珠性中耳炎の定量的研究

概要

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Forty four cases, Forty seven ears, of cholesteatoma in adult were studied using polytomo-graphy by AP (cochlear, vestibular and antral planes) and lateral (antral, 2mm medial to antral and tympanal planes) projections. The structures related to the middle ear cleft and to the surgical and developmental landmarks of the temporal bone were measured, and the results were compared to those of the normal adult ears. Measures related to the middle ear cleft were larger in cholesteatomatous ear than in normal, and those related to the developmental land marks of the temporal bone were smaller in cholesteatomatous ear. These differences were statistically significant in the majority of cases. As the conclusion, cholesteatoma is essentially an expansive lesion causing bone destruction, and the poorly developed temporal bone is valuable to cholesteatoma.Cholesteatoma cases were classified to type 1 (confined to the attic), type 2 (extending from attic to aditus) and type 3 (from attic to antrum), and measures were compared between three types. Type 3 showed large measures not only in the antrum but also in the aditus and attic. Type 3 shows extensive distribution and bone destruction. Bibliographical discussions were also included.
社団法人日本耳鼻咽喉科学会の論文