Incidence of facial nerve canal fluid/meningocelea
| None (No.) | Unilateral (No.) | Bilateral (No.) | |
|---|---|---|---|
| Labyrinthine segment fluid | 168 (82.4%) | 22 (10.8%) | 14 (6.9%) |
| Geniculate ganglion fossa fluid | 164 (80.4%) | 21 (10.3%) | 19 (9.3%) |
| Geniculate ganglion fossa meningocele | 199 (97.5%) | 5 (2.5%) | 0 (0.0%) |
↵a Incidence of fluid signal in the facial nerve canal on 3D fast spin-echo T2 sequences in 204 patients. Meningoceles were defined on the basis of size criteria: ≥1.0-mm diameter of the labyrinthine segment of the facial nerve canal, and ≥2.0-mm diameter of the geniculate ganglion fossa. No meningoceles were observed within the labyrinthine segment.