Objective: MRI observation is part of the regular follow-up after vestibular schwannoma (VS) or intralabyrinthine schwannoma (ILS) resection. Because cochlear implantation (CI) after resection is part of the audiological rehabilitation process, the magnet resonance imaging (MRI) behavior of CI systems needs to be considered. In light of recent developments in MRI artifact positioning and pain prevention, this study evaluates reproducible MRI observations after tumor resection and CI surgery as part of follow-up. Methods: In a retrospective study, we evaluated 9 patients with a T1 KM, T2 sequence MRI observation, and cone beam computed tomography (CBCT) after ILS/VS resection and CI. In all but one case, a CI with a diametrically bipolar magnet and a receiver positioned 8-9 cm behind the external auditory canal was performed. Results: In all but one case, MRI observation allowed for a pain-free visual assessment of the intralabyrinthine and internal auditory canal (IAC) regions. In one case, a painful dislodgement of the receiver magnet occurred. Conclusion: MRI follow-up after ILS and VS resection and CI is reproducibly possible. Implant choice and positioning should be considered before implantation to allow for a pain-free visual assessment afterward. This finding allows for the first time a widening of the indication into this patient group.

中文翻译：

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迷路内和前庭神经鞘瘤切除术和人工耳蜗植入后的MRI观察。

目的：MRI观察是前庭神经鞘瘤（VS）或迷路神经鞘内神经鞘瘤（ILS）切除术后定期随访的一部分。由于切除后的人工耳蜗植入（CI）是听觉康复过程的一部分，因此需要考虑CI系统的磁共振成像（MRI）行为。鉴于MRI伪影定位和疼痛预防的最新发展，本研究评估了肿瘤切除和CI手术后可重复的MRI观察结果，作为后续研究的一部分。方法：在一项回顾性研究中，我们评估了9例TLS，T2序列MRI观察以及ILS / VS切除和CI后的锥束计算机断层扫描（CBCT）的患者。在除一种情况外的所有情况下，均执行了具有直径双极磁体和位于外耳道后8-9厘米的接收器的CI。结果：除一种情况外，在所有情况下，MRI观察都可以对迷路内和内耳道（IAC）区域进行无痛的视觉评估。在一种情况下，发生了接收器磁铁的痛苦脱落。结论：ILS和VS切除及CI后的MRI随访是可重复的。植入前应考虑植入物的选择和位置，以便以后进行无痛的视觉评估。这一发现首次使适应症扩大到该患者组。植入前应考虑植入物的选择和位置，以便以后进行无痛的视觉评估。这一发现首次使适应症扩大到该患者组。植入前应考虑植入物的选择和位置，以便以后进行无痛的视觉评估。这一发现首次使适应症扩大到该患者组。