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Congenital stapes ankylosis by elongation of the pyramidal eminence.
Summary of operative findings in chronologic order of operations Patient Ear Findings 1 Right Bony shell covering stapes tendon Left Bony bar from posterior ear canal to head of stapes, running slightly superior to stapes tendon 2 Left Bony bar from posterior ear canal to head of stapes, running slightly superior to stapes tendon Right A fairly thin, half-pipe-shaped bone extending from the posterior ear canal wall to the head of the stapes; pyramidal eminence present; stapes tendon absent 3 Left Bony bar from posterior ear canal to head of stapes, running slightly superior to stapes tendon Right Bony bar from posterior ear canal to head of stapes, running slightly superior to stapes tendon Table 2.