Akademik Veri Yönetim Sistemi
23. Ulusal Anatomi Kongresi, Ankara, Türkiye, 11 Ekim 2023, cilt.54, sa.2, ss.12
Objective: In our study, we aimed to evaluate the frequency and types of internal auditory canal anomalies
that may accompany external auditory canal (EAC) atresia, stenosis and auricular anomalies in pediatric
cases with hearing loss on CT (computed tomography) images.
Methods: 20 patients under the age of 18 with EAC atresia, microtia, auricular anomaly, who underwent
temporal CT had both ears evaluated retrospectively. Temporal bone and middle ear cavity pneumatization
were graded. Coronal and axial sections were evaluated and the length and diameter of the internal acoustic
canal, cochlea length and variations, bone chain pathology in the middle ear, semicircular canal variations,
the presence of jugular bulbus anomaly were evaluated.
Results: In our patients with atresia or hypoplasia of the EAC, pneumatization of the temporal bone was
most common in the infralabyrinth. Pneumatization of the middle ear was found at a high rate in our
patients. In our study, the mean length and diameter of the internal auditory canal and the mean length
of the cochlea were measured, and no significant difference was found on either side. Incudo-malleolar
complex anomaly was detected most frequently, and semicircular canal abnormality was detected at a low
rate.
Conclusion: It is crucial to identify any congenital abnormalities that may occur alongside EAC atresia
when selecting patients who could potentially benefit from surgical intervention. This study is the first to
conduct all of these evaluations in such detail in this specific age group.
Keywords: middle ear anomaly, inner ear anomaly, external auditory canal anomaly, CT, congenital
anomaly