| Preoperative    Characteristics | Value | 
      
        | No of patients |  | 10 | 
      
        | Age | median | 43 y | 
      
        |  | range | 23 - 57 y | 
      
        | Sex | male | 5 | 
      
        |  | female | 5 | 
      
        | Side | left | 6 | 
      
        |  | right | 4 | 
      
        | Symptoms | duration: median | 3.3 y | 
      
        |  | duration: range | 0.5 - 7 y | 
      
        |  | hearing loss - partial (G-R 1-2) | 5 | 
      
        |  | hearing loss - partial (G-R 3-4) | 0 | 
      
        |  | hearing loss - total (G-R 5) | 5 | 
      
        |  | tinnitus | 2 | 
      
        |  | imbalance | 4 | 
      
        |  | vertigo | 1 | 
      
        | Class  /  location | Intravestibular     (IVE) | 2 | 
      
        |  | Intracochlear     (ICO) | 2 | 
      
        |  | Intravestibulocochlear     (IVC) | 2 | 
      
        |  | Transmacular  (TMA) | 2 | 
      
        |  | Transmodiolar     (TMO) | 2 | 
      
        | Indication for Tt | symptoms worsening | 8 | 
      
        |  | tumor progression | 4 | 
      
        | Reason for GKR | hearing status | 5 | 
      
        |  | risks of surgery | 7 |