Yu Zilong, Han Demin, Dai Haijiang, Zhao Shouqin, Zheng Yali
Department of Otolaryngology, Affiliated Beijing Tongren Hospital Capital of University of Medical Sciences, Beijing, PR China.
Acta Otolaryngol. 2007 Mar;127(3):323-7. doi: 10.1080/00016480600895086.
High resolution CT imaging can provide useful information about the pathological exposure of the mastoid portion of the facial nerve before mastoid surgery and can assess the injury site of the facial nerve after operation.
To evaluate the diagnostic value of high resolution CT scanning of pathological exposure of the mastoid portion of facial nerve and provide valuable information for otologic surgery, and to analyse the cause of facial nerve paralysis after operation.
Routine CT scanning was used to examine patients with chronic suppurative otitis media and external auditory canal cholesteatoma preoperatively by axial-transverse and coronal views. If there was any pathological exposure of the mastoid portion of the facial nerve on CT imaging, then this was compared with intraoperative findings. In addition, one patient who had suffered postoperative facial nerve paralysis was also examined by CT scanning to determine whether any pre-existing pathological exposure of facial nerve could be found.
Through routine CT scanning six patients with chronic suppurative otitis media and three patients with external auditory canal cholesteatoma were found to have pathological exposure of the mastoid portion of the facial nerve. Coronal views could more clearly show the size and the position of the exposure; the corresponding surgical findings (pathological exposure) for the facial nerve could be confirmed in all nine patients. CT imaging could also show that the patient who had suffered postoperative facial nerve paralysis did indeed have pre-existing pathological exposure of the mastoid portion of the facial nerve.
高分辨率CT成像能够在乳突手术前提供有关面神经乳突段病理暴露的有用信息，并能评估术后面神经的损伤部位。
评估面神经乳突段病理暴露的高分辨率CT扫描的诊断价值，为耳科手术提供有价值的信息，并分析术后面神经麻痹的原因。
采用常规CT扫描，通过轴位-横断位和冠状位视图对慢性化脓性中耳炎和外耳道胆脂瘤患者进行术前检查。如果CT成像显示面神经乳突段有任何病理暴露，则将其与术中所见进行比较。此外，还对一名术后出现面神经麻痹的患者进行了CT扫描，以确定是否能发现面神经先前存在的病理暴露。
通过常规CT扫描，发现6例慢性化脓性中耳炎患者和3例外耳道胆脂瘤患者存在面神经乳突段的病理暴露。冠状位视图能更清晰地显示暴露的大小和位置；所有9例患者面神经的相应手术所见（病理暴露）均得到证实。CT成像还显示，术后出现面神经麻痹的患者确实存在面神经乳突段先前存在的病理暴露。
