Translabyrinthine schwannoma resection nine months ago
Vignette
A 60-year-old man who underwent a left translabyrinthine resection nine months ago reports near-normal function. SHA shows symmetric gain within the normal band and almost no phase lead. Caloric testing shows complete left areflexia.
RCT pattern
Three-panel SHA summary. Shaded green = published normal band. Solid marker = patient/archetype curve; dashed = overlaid reference if shown.
Question
How can SHA look normal when the left labyrinth is gone?