Abstract
To determine the influence of posterior fossa dimensions on surgical outcomes after vestibular schwannoma management. Retrospective chart review. Tertiary care academic medical center. Patients with sporadic vestibular schwannomas who underwent surgical resection via retrosigmoid or translabyrinthine techniques. Diagnostic. One and two-way analysis of variance (ANOVAs) of the cohort based on volumetric and clinical outcome groupings. A total of 95 patients were identified. A one-way ANOVA looking at the entire cohort of patients showed that outcomes like surgical time (p < 0.001) and whether a Good Outcome (House-Brackmann score of 1 or 2, no complications, and a complete resection) was achieved (p = 0.009) correlated very well with preoperative tumor volume, but not with posterior fossa volume (p = 0.412 and p = 0.345, respectively). However, in medium sized tumors, House-Brackmann group was correlated with posterior fossa volume (p = 0.032). The present data suggest a small effect of posterior fossa size on some clinical outcomes in medium sized vestibular schwannomas.
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