The main purpose of this study is to determine the radiological incidence of Superior (SSCD) and Posterior Semicircular Canal Dehiscence (PSCD) and to compare radiologic SSCD to the incidence of this condition on cadaver specimen. We have also analysed the relation between the ossification state of the semicircular canals and the degree of mastoid pneumatization and integrity of Tegmen Tympani.
Otolaryngology Department, Hospital de Basurto, University of the Basque Country, Avenida de Montevideo 18, Bilbao, Vizcaya, Spain. macdlt@telefonica.net
