Takegoshi Hideki, Kaga Kimitaka, Kikuchi Shigeru, Ito Ken
Department of Otorhinolaryngology, Faculty of Medicine, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8655, Japan.
Radiology. 2002 Dec;225(3):852-8. doi: 10.1148/radiol.2253010942.
To ascertain the location of the facial nerve in patients with microtia by using thin-section computed tomography (CT).
Thin-section CT was performed in 66 ears of patients with microtia (unilateral, n = 12; bilateral, n = 34) and mandibulofacial dysostosis (MFD, n = 20). Findings were compared with those in 22 ears with normal auricles (control group) by using the Dunnett two-sided t test.
The facial nerve at the mastoid portion in patients with MFD was 2 mm more lateral and 3 mm more anterior than that in control subjects (P <.01). The same portion in patients with microtia was 3 mm more anterior than that in the control subjects (P <.01). The distance between the facial nerve and the most lateral point of the temporal bone in patients with MFD was 10 mm shorter and that in patients with bilateral microtia was 3 mm shorter than that in the control subjects (P <.01).
The facial nerve in patients with microtia was not more lateral from the Bill bar (vertical crest) than that in control subjects. The facial nerve in patients with MFD was different from that in patients with microtia who had no other head anomalies.
通过使用薄层计算机断层扫描（CT）确定小耳畸形患者面神经的位置。
对66只小耳畸形患者的耳朵（单侧，n = 12；双侧，n = 34）以及下颌面骨发育不全（MFD，n = 20）患者进行薄层CT检查。通过Dunnett双侧t检验将结果与22只正常耳廓耳朵（对照组）的结果进行比较。
MFD患者乳突部的面神经比对照组更靠外侧2 mm，更靠前3 mm（P <.01）。小耳畸形患者的同一部位比对照组更靠前3 mm（P <.01）。MFD患者面神经与颞骨最外侧点之间的距离比对照组短10 mm，双侧小耳畸形患者比对照组短3 mm（P <.01）。
小耳畸形患者的面神经相对于比尔棒（垂直嵴）并不比对照组更靠外侧。MFD患者的面神经与无其他头部异常的小耳畸形患者不同。
