Dehiscence in the superior semicircular canal. Anatomic incidence study

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Jaime Whyte O.
Claudio Martínez M.
Ana Cisneros G.
Jesús Obón N.
Borja Gracia-Tello
Miguel Ángel Crovetto D.

Keywords

Dehiscence, superior semicircular canal, anatomical incidence

Abstract

Introduction: The presence of dehiscence in the superior semicircular canal shows a remarkable difference between radiological (from 1% to 19%) and anatomical incidence (between 0,4% and 0,6%). Aim: To determine the incidence anatomical superior semicircular canal dehiscence. Material and method: The incidence of dehiscence in superior semicircular canal in 80 skulls (160 temporal bones) is studied. Results: We have observed the presence of one dehiscence in the superior semicircular canal in one skull from the 80 studied, representing an incidence of 0.6%. The possible causes are discussed because of the prevalence of the radiological studies is highly superior to anatomical studies. Conclusion: It is obvious the over-diagnosis performed about the dehiscences in the superior semicircular canal since anatomical finds are quite different from the results obtained by means of image technics.

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