Bayazit Yildirim A, Ozer Enver, Kanlikama Muzaffer
Department of Otolaryngology, Faculty of Medicine, Gaziantep University, Gaziantep, Turkey.
J Laryngol Otol. 2002 Oct;116(10):800-3. doi: 10.1258/00222150260293600.
Understanding the relationship between the anatomy of the fallopian canal and a variety of ear diseases is necessary. In this study, our purpose was to identify the incidence of facial nerve dehiscence in patients undergoing surgery for a variety of chronic ear diseases. The operative records of 219 patients were reviewed retrospectively for dehiscence of the facial canal. The diagnoses were cholesteatoma (n = 49), tympanosclerosis (n = 51), adhesive otitis media (n = 38), and chronic otitis media (n = 81). Only 17 of 219 who underwent tympanoplasty without mastoidectomy were excluded from the calculations. Dehiscence of the facial canal was encountered in 18 (8.9 per cent) of 202 patients. The dehiscence rate was highest with cholesteatoma, followed by adhesive otis media, chronic otis media and tympanosclerosis (p < 0.01). The canal dehiscence was mainly seen in the tympanic segment and second genu, and was rare in the mastoid segment. Labyrinthine fistula was the most common pathology that coexisted with the dehiscence. It was encountered in two (11.1 per cent) of 18 patients. In conclusion, the likelihood of dehiscent bone covering the tympanic segment of the fallopian canal is significantly higher in cholesteatoma than the other chronic ear diseases. The surgeon can feel somewhat more confident while performing surgery for tympanosclerosis as far as the dehiscence in the fallopian canal is concerned.
了解面神经管解剖结构与多种耳部疾病之间的关系很有必要。在本研究中，我们的目的是确定接受各种慢性耳部疾病手术患者的面神经裂缺发生率。回顾性分析了219例患者的手术记录，以检查面神经管裂缺情况。诊断包括胆脂瘤（n = 49）、鼓室硬化（n = 51）、粘连性中耳炎（n = 38）和慢性中耳炎（n = 81）。计算时仅排除了219例中未行乳突切除术的17例行鼓室成形术的患者。202例患者中有18例（8.9%）出现面神经管裂缺。裂缺率以胆脂瘤最高，其次是粘连性中耳炎、慢性中耳炎和鼓室硬化（p < 0.01）。面神经管裂缺主要见于鼓室段和第二膝部，乳突段少见。迷路瘘管是与裂缺并存的最常见病变。18例患者中有2例（11.1%）出现迷路瘘管。总之，胆脂瘤患者面神经管鼓室段骨质裂缺的可能性明显高于其他慢性耳部疾病。就面神经管裂缺而言，外科医生在进行鼓室硬化手术时可能会更有信心。
