Facial canal anatomy in patients with mandibulofacial dysostosis: comparison with respect to the severities of microtia and middle ear deformity.
OBJECTIVE
To study the difference in the facial canal anatomy in terms of the severity of microtia and deformity of the middle ear in patients with mandibulofacial dysostosis using high-resolution computed tomography.


METHODS
Retrospective analyses.


METHODS
The study was carried out at the Department of Otorhinolaryngology, University of Tokyo, Tokyo, Japan.


METHODS
Thirty-six ears of 18 patients with mandibulofacial dysostosis were examined by high-resolution computed tomography. These ears were graded based on the Marx classification and Jahrsdoerfer scoring systems.


METHODS
The high-resolution computed tomography findings and age distribution of each group were compared with those of other groups by multiple comparison using Tukey's honestly significant difference test.


RESULTS
The course of the facial nerve was not significantly different in terms of the severity of microtia and deformity of the middle ear. The bony cochlea in the patients with mandibulofacial dysostosis was displaced by a mean value of 2 mm more anteriorly and a mean value of 0.7 mm shallower than that in the cases with normal auricles.


CONCLUSIONS
The facial nerve of patients with mandibulofacial dysostosis is displaced more anterolaterally than that of the cases with normal auricles; however, the auricle anomaly is not severe.
Takegoshi
Hideki
H
Department of Otorhinolaryngology, Faculty of Medicine, University of Tokyo, Tokyo, Japan. takegosi@saitama-med.ac.jp
Kaga
Kimitaka
K
Chihara
Yasuhiro
Y
D000293:Adolescent; D000886:Anthropometry; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D003051:Cochlea / Q000000981:diagnostic imaging; D000013:Congenital Abnormalities / Q000000981:diagnostic imaging; D004431:Ear, External / Q000002:abnormalities*; D004432:Ear, Middle / Q000002:abnormalities*; D005154:Facial Nerve / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008342:Mandibulofacial Dysostosis / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D012720:Severity of Illness Index; D014057:Tomography, X-Ray Computed / Q000379:methods