Tabulated data showing the number of tumours identified on both the superior and inferior vestibular nerves for each patient
| Number of tumours | Left | Total | ||||
|---|---|---|---|---|---|---|
| None | 1 | 2 | 3–5 | Full | ||
| Right | ||||||
| None | 7 | 0 | 0 | 4 | 0 | 11 |
| 1 | 1 | 0 | 1 | 1 | 0 | 3 |
| 2 | 0 | 0 | 3 | 1 | 0 | 4 |
| 3–5 | 0 | 2 | 0 | 5 | 1 | 8 |
| Full | 1 | 0 | 1 | 0 | 13 | 15 |
| Total | 9 | 2 | 5 | 11 | 14 | 41 |
‘Full’ implies the tumour mass could not be identified as a single tumour focus of origin and was filling the internal auditory meatus, with or without cerebellopontine angle encroachment. Fisher's exact test for independence of the numbers of left and right hand tumours is significant at p<0.001.