PT  - JOURNAL ARTICLE
AU  - Mayer, T E
AU  - Brueckmann, H
AU  - Siegert, R
AU  - Witt, A
AU  - Weerda, H
TI  - High-resolution CT of the temporal bone in dysplasia of the auricle and external auditory canal.
DP  - 1997 Jan 01
TA  - American Journal of Neuroradiology
PG  - 53--65
VI  - 18
IP  - 1
4099  - http://www.ajnr.org/content/18/1/53.short
4100  - http://www.ajnr.org/content/18/1/53.full
SO  - Am. J. Neuroradiol.1997 Jan 01; 18
AB  - PURPOSE To determine CT findings in the external, middle, and inner ear of patients with microtia and external auditory canal dysplasia.METHODS We used high-resolution CT, with multiplanar or axial 1-mm continuous sections, coronal or sagittal reformations, or low-dose spiral acquisitions, to examine 184 temporal bones of children with microtia.RESULTS In cases of minor microtia, auditory canal stenosis was the most common associated abnormality; in those with major microtia, atresia was predominant. Middle ear malformations depended on the severity of the auricular anomalies. Inner ear changes could also be noted. Ossicle dysplasias occurred in 98% of patients (stapes, 72%), absence of the oval window in 36%, labyrinthine malformations in 13%, closed round window in 6%, facial canal displacement in up to 75%, and aberrations of the vascular canal in 38% of patients with third-grade auricular deformity.CONCLUSION A variety of external, middle, and, less frequently, inner ear changes were detected in connection with microtia.