外耳道正常な耳小骨奇形の9症例

抄録

Five of the nine patients in this series had incudostapedial joint separation, two had stapes fixation, one had incudostapedial joint separation and incus fixation, and one had a dislocated stapes foot plate that had no contact with the oval window.
Autografts were used to reconstruct the discontinuity in six cases, and good results were obtained. Stapes surgery was done in three cases, and was successful in two cases.
The etiology of the anomalies observed in these patients is discussed from the standpoint of temporal bone embryology.
The results of pre-operative auditory function tests were evaluated. However, it was difficult to predict pre-operatively by auditory examination which type of ossicular anomalies the patients had.