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Does NF2 status impact the results of combined surgery and adjunctive Gamma Knife surgery for large vestibular schwannomas?

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Abstract

In order to verify whether neurofibromatosis type 2 (NF2) could influence the oncological and functional outcome in large vestibular schwannoma (VS) surgery, we compared a group of NF2 patients operated with a facial nerve-sparing technique to a group of sporadic VSs of similar volume that underwent the same treatment regimen in the same period. Single-center retrospective cohort study about 12 consecutive NF2 and 69 non-NF2 patients operated on for large VS between September 2006 and November 2016. After resection, patients were allocated to an upfront Gamma Knife surgery policy of the tumor residue. At last follow-up examination, the facial nerve function was good (House-Brackmann grades I or II) in 92% of the NF2 and 83% of the non-NF2 patients (p = .90). The median volume of tumor residue was .92 cc in the NF2 group and .54 cc in the non-NF2 group (p = .14). Tumor control was achieved in 83% and 81% of cases in the NF2 and the non-NF2 populations, respectively, with a mean follow-up of 73 months in both groups. The 1-, 5-, and 7-year progression-free survival were 92%, 83%, and 83% respectively in the NF2 group, and 99%, 83%, and 80% in the non-NF2 group (p = .96). Our analysis of 12 NF2 and 69 non-NF2 patients operated on by the same surgical team with the same treatment regimen did not show any functional or tumor control difference between those groups.

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Authors and Affiliations

  1. Department of Neurosurgery, North University Hospital, APHM-AMU, Chemin des Bourrely, 13015, Marseille, France

    Lucas Troude, Mohamed Boucekine, Marion Montava, Anne Balossier, Jean-Pierre Lavieille, Jean Régis & Pierre-Hugues Roche

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  1. Lucas Troude
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  2. Mohamed Boucekine
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  3. Marion Montava
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  4. Anne Balossier
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  5. Jean-Pierre Lavieille
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  6. Jean Régis
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  7. Pierre-Hugues Roche
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All authors have made substantial contributions so as to qualify for authorship, and have read and approved the final version of this manuscript.

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Correspondence to Lucas Troude.

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Ethics approval was obtained from the Comité d’Ethique de l’université d’Aix-Marseille, authorization number: 2018-24-01-003.

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Informed consent of all patients was obtained, and our institutional local ethical committee approved this study.

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Troude, L., Boucekine, M., Montava, M. et al. Does NF2 status impact the results of combined surgery and adjunctive Gamma Knife surgery for large vestibular schwannomas?. Neurosurg Rev 43, 1191–1199 (2020). https://doi.org/10.1007/s10143-019-01143-y

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  • DOI: https://doi.org/10.1007/s10143-019-01143-y

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