Intralabyrinthine distribution of the 52 intralabyrinthine schwannomas at initial MR imaging
| Initial Lesion Location | No. of Patients, % |
|---|---|
| Intracochlear | 42 (80.7) |
| Basal turn | 4 (7.7) |
| ST | 3 (5.8) |
| SV + ST | 1 (1.9) |
| Second turn | 10 (19.2) |
| ST | 9 (17.3) |
| SV + ST | 1 (1.9) |
| Apical turn | 6 (11.5) |
| ST | 4 (7.7) |
| SV + ST | 2 (3.8) |
| Basal turn + second turn | 17 (32.7) |
| ST | 8 (15.4) |
| ST and SV of both turns | 5 (9.8) |
| ST basal turn and ST + SV second turn | 3 (5.8) |
| ST + SV basal turn and ST second turn | 1 (1.9) |
| Apical turn + second turn | 5 (9.5) |
| ST | 2 (3.8) |
| SV | 1 (1.9) |
| ST apical turn and SV + ST second turn | 2 (3.8) |
| Intravestibular | 7 (13.5) |
| Anterior portion | 1 (1.9) |
| SCCs | 2 (3.8) |
| (Anterior + posterior) vestibule + SSC | 3 (5.8) |
| Anterior vestibule + SCCs | 1 (1.9) |
| Anterior vestibula + all cochlear turns | 3 (5.8) |
Note:—ST indicates scala tympani; SV, scala vestibuli; SCC, semicircular canal.