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首页> 外文期刊>The Laryngoscope: A Medical Journal for Clinical and Research Contributions in Otolaryngology, Head and Neck Medicine and Surgery, Facial Plastic and Reconstructive Surgery .. >Postoperative magnetic resonance imaging findings after transtemporal and translabyrinthine vestibular schwannoma resection.
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Postoperative magnetic resonance imaging findings after transtemporal and translabyrinthine vestibular schwannoma resection.

机译：经颞及迷路前庭神经鞘瘤切除术后的磁共振成像结果。

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OBJECTIVES/HYPOTHESIS: Magnetic resonance imaging (MRI) has become the investigation of choice to follow up patients after vestibular schwannoma resection. STUDY DESIGN: Retrospective. METHODS: Postoperative MRI findings of 70 patients after vestibular schwannoma resection through a transtemporal (n = 48) and a translabyrinthine (n = 22) approach were reviewed. Time-dependent changes in intensity, size, and shape of enhancement in the internal auditory canal before and after contrast administration, postoperative temporal lobe gliosis, and changes of fat grafts were evaluated. RESULTS: After vestibular schwannoma resection, all patients showed signal enhancements in the internal auditory canal ranging from a faint to high signal intensity in the first postoperative MRI, 3 to 6 months after surgery. In the next MRI at 12 to 24 months after surgery, 30 patients (43%) showed a decreased signal, 35 patients (50%) a stable enhancement, and 5 patients (7%) an increased enhancement in the internal auditory canal depicted as an intense nodular or mass-like pattern. In patients with decreased or stable enhancement, a residual tumor could be excluded in the following MRI scans, whereas in all patients with increased enhancements after 12 to 24 months, signal enhancement further increased and residual tumors were detected. Different degrees of temporal lobe gliosis were found in 15 of 48 cases (31%) after transtemporal tumor removal. Enhancement of fat grafts used in 22 cases decreased to different degrees in 14 cases (64%). CONCLUSIONS: Differentiation of residual tumor from scar tissue in the internal auditory canal after vestibular schwannoma resection requires close, long-term follow-up. Nodular and progressive enhancements in the internal auditory canal indicate residual tumor. Linear enhancement in the internal auditory canal has been found to be a common finding after vestibular schwannoma resection not associated with residual tumor.
机译：目的/假设：磁共振成像（MRI）已成为对前庭神经鞘瘤切除术后患者进行随访的首选研究。研究设计：回顾性研究。方法：回顾性分析了70例前庭神经鞘瘤患者经颞颞（n = 48）和经迷路穿刺（n = 22）手术后的MRI表现。评价了对比剂给药前后，术后颞叶神经胶质增生和脂肪移植物的变化前后内听道强度，大小和增强形状随时间的变化。结果：前庭神经鞘瘤切除术后，所有患者在术后3到6个月的首次MRI中均显示出内耳道信号增强，范围从微弱到高信号强度。在术后12至24个月的下一次MRI中，有30例患者（43％）的信号减弱，35例患者（50％）的稳定增强，5例患者（7％）的内耳道增强增强，如下所示：强烈的结节状或块状图案。在增强程度降低或稳定的患者中，可以在随后的MRI扫描中排除残留的肿瘤，而在所有增强程度在12至24个月后增强的患者中，信号增强进一步增加，并且可以检测到残留的肿瘤。颞颞部肿瘤切除术后48例中有15例（31％）发现了不同程度的颞叶胶质增生。使用脂肪移植物的增强22例，不同程度降低14例（64％）。结论：前庭神经鞘瘤切除术后，内耳道瘢痕组织与残留肿瘤的鉴别需要长期密切随访。内听道的结节性和进行性增强表明残留肿瘤。在前庭神经鞘瘤切除术后，与残留肿瘤无关的内耳道线性增强是常见的发现。

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