AI Article Synopsis
- This study looked at facial nerve schwannomas (FNSs) and hemangiomas (FNHs) to understand their characteristics, clinical features, and management options, specifically the effectiveness of cable nerve grafting after nerve sectioning during tumor removal.
- The retrospective analysis involved 84 FNS and 42 FNH cases treated at a specialized center from 1989 to 2020, focusing on the locations of the tumors and the postoperative results over time.
- Findings revealed that FNSs usually affected more nerve segments than FNHs, with around 78.6% of patients successfully restored through cable grafting; patient outcomes improved significantly, especially in those with lower preoperative House-Brackmann grades.
Article Abstract
Objectives: To characterize facial nerve (FN) schwannomas (FNSs) and FN hemangiomas (FNHs) and their clinical features and management strategies, and to describe the results of cable nerve grafting after FN sectioning during tumor removal.
Methods: This retrospective study included 84 FNS cases and 42 FNH cases managed between July 1989 and July 2020 at a quaternary referral center for skull base pathology. Clinical details, locations, management, and results of cable nerve grafting at 1 year and during an average period of 3.12 years were evaluated. Sural nerve interpositioning was performed for patients who experienced FN paralysis for less than 1 year and underwent nerve sectioning during tumor removal.
Results: FNSs more often involved multiple segments compared with FNHs. The cerebellopontine angle and the mastoid segments were involved in 16 (19.1%) and 34 (40.5%) FNS cases, respectively; however, the cerebellopontine angle and the mastoid segments were involved in 0 and 7 (16.7%) FNH cases, respectively. Sectioned nerves of 99 patients (78.6%) were restored using interposition cable grafting. At the last follow-up evaluation, 56.3% of FNSs and 60.7% of FNHs attained House-Brackmann (HB) grade III. Lower preoperative HB grades were associated with poorer postoperative outcomes. For FNSs, the mean HB grades were 4.13 at 1 year postoperatively and 3.75 at the last follow-up evaluation ( p = 0.001); however, for FNHs, the mean HB grades were 4.04 postoperatively and 3.75 at the last follow-up evaluation. Therefore, extradural coaptation yielded better outcomes.
Conclusion: FNSs can occur along any part of the FN along its course, and FNHs are concentrated around the area of geniculate ganglion. The results of cable inter positioning grafts are better in patients with preoperative FN-HB-III or less when compared with higher grades. The outcome of the interpositioning continues to improve even after 1 year in extradural coaptation.
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| http://dx.doi.org/10.1097/MAO.0000000000004033 | DOI Listing |
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