Microanatomy of the relationship between acoustic neuroma and the arachnoid
HUANG An-Long, QI Song-Chao, ZHANG Chi-An, DAN Jin, BO Jun, QIU Xiao-Yu
Chinese Journal of Clinical Anatomy ›› 2013, Vol. 31 ›› Issue (4) : 467-471.
Microanatomy of the relationship between acoustic neuroma and the arachnoid
Objective To review microsurgical techniques and facial nerve preservation issues in resection of acoustic neuroma. Methods Clinical data of 121 patients with acoustic neuroma who were surgically treated in our hospital from Jan 2009 to Oct 2012 were retrospectively analyzed. Acoustic neurinomas were removed by microsurgical technique through the suboccipital retrosigmoid approach accompanied by face nerve EMG monitoring. Results Total separation was achieved in 100% (121cases)． The facial nerve was preserved anatomically in 93.4% (113 cases) and the cochlear nerve in 90.1% (109 cases). There was no surgery-related fatality. In a 3-month follow-up, according to House-Brackmann, the function of facial never was I-II level in 71.9% (87 cases), III-IV in 25.6% (31cases), V-VI in 3.3% (4 cases). Conclusion Profound understanding of the relationship between the acoustic neuroma and the arachnoid can drastically reduce the incidence of acial nerve damage during resection of acoustic neuromas.
Acoustic neurinomas / Facial nerve / Arachnoid / Microanatomy
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