Anatomo-radiological study of the Superior Semicircular Canal Dehiscence Radiological considerations of Superior and Posterior Semicircular Canals

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...

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Veröffentlicht in:European journal of radiology 2010-11, Vol.76 (2), p.167-172
Hauptverfasser: CROVETTO, M, WHYTE, J, RODRIGUEZ, O. M, LECUMBERRI, I, MARTINEZ, C, ELEXPURU, J
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container_end_page 172
container_issue 2
container_start_page 167
container_title European journal of radiology
container_volume 76
creator CROVETTO, M
WHYTE, J
RODRIGUEZ, O. M
LECUMBERRI, I
MARTINEZ, C
ELEXPURU, J
description 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. Temporal bones have been investigated by means of CT scan on patients and direct observation on cadaver specimen, respectively. 604 ears and 160 cadaver temporal bones have been investigated by means of CT scan and direct observation, respectively. 3.6% and 0.3% of the studied ears had SSCD and PSCD, respectively, on CT scan. Only 0.6% of the cadaver specimen ears did have anatomical SSCD. Degree of pneumatization of the mastoid bone is related to the mean thickness of bone overlying the Superior and Posterior Semicircular Canal. Radiological absence of Tegmen Tympani is more frequent in ears that also have radiologic SSCD. CT scanning gives higher incidence figures of SSCD than anatomical studies, 3.6% vs. 0.6%. We also found a 0.6% incidence of radiological PSCD in the studied ears. There is a direct relation between the degree of ossification of Superior and Posterior Semicircular Canal and certain temporal bone anatomic features: temporal bone pneumatization and absence/presence of Tegmen Tympani or Antri.
doi_str_mv 10.1016/j.ejrad.2009.05.038
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source MEDLINE; Elsevier ScienceDirect Journals
subjects Adolescent
Adult
Aged
Aged, 80 and over
Biological and medical sciences
Child
Child, Preschool
Ear, auditive nerve, cochleovestibular tract, facial nerve: diseases, semeiology
Female
Humans
Incidence
Labyrinth Diseases - diagnostic imaging
Labyrinth Diseases - epidemiology
Labyrinth Diseases - pathology
Male
Medical sciences
Middle Aged
Non tumoral diseases
Otorhinolaryngology. Stomatology
Risk Assessment
Risk Factors
Semicircular Canals - diagnostic imaging
Semicircular Canals - pathology
Spain - epidemiology
Tomography, X-Ray Computed - statistics & numerical data
Young Adult
title Anatomo-radiological study of the Superior Semicircular Canal Dehiscence Radiological considerations of Superior and Posterior Semicircular Canals
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