小儿耳科-先天性镫骨强直

Surgery for isolated congenital stapes ankylosis on a 17 year-old child (Teunissen-Cremers Class I case). Transcanal approach. The VIIth nerve is not dehiscent but the Fallopian canal is really large, thus hiding the stapes footplate. Ossicular chain mobility assessement reveals a stapes fixation with normal malleus-incus complex mobility. There is no otosclerotic focus. The stapes footplate appears to be abnormally thick and resistant. The drilling out procedure to fenestrate the labyrinth is more difficult and requires more time than for otosclerostic stapes fixation. Ossiculoplasty is performed with a 0.4-mm diameter Bucket Robinson type prosthesis. Dr Robert Vincent, Causse Ear Clinic, Béziers (Colombiers), France

                               
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