Seki Y, Samejima N, Kumakawa K, Komatsuzaki A
Department of Neurosurgery, Tokyo Kyosai Hospital, Tokyo, Japan.
Acta Neurochir Suppl. 2003;87:85-7. doi: 10.1007/978-3-7091-6081-7_18.
A 26-year-old female with NF2 underwent removal of an acoustic schwannoma via extended retrosigmoid approach with subtonsillar placement of the auditory brainstem implant. The patient had already shown palsy of the lower cranial nerves on the opposite side due to previous surgery. Differing from conventional routes such as the translabyrinthine and the retrosigmoid, the subtonsillar approach enabled us to observe the entire cochlear nucleus and avoid injury to the 9th and 10th cranial nerves when applying the electrode. Hearing in pure tone average was maintained almost at the preoperative level. We present a new use of this approach in placing the electrode and discuss its advantages.
一名患有神经纤维瘤病2型（NF2）的26岁女性，通过扩大乙状窦后入路并在扁桃体下放置听觉脑干植入物，接受了听神经鞘瘤切除术。由于之前的手术，该患者对侧已经出现了低位颅神经麻痹。与传统入路如迷路后入路和乙状窦后入路不同，扁桃体下入路使我们能够观察到整个蜗神经核，并在放置电极时避免损伤第9和第10颅神经。纯音平均听阈几乎维持在术前水平。我们展示了这种入路在放置电极方面的新用途，并讨论了其优点。
