| Criteria | Description | Present Case |
|---|---|---|
| A | ≥2 episodes of spontaneous vertigo lasting 20 min–12 h | Yes (40–60 min) |
| B | Audiometrically documented hearing loss | Not confirmed |
| C | Fluctuating aural symptoms (hearing loss, tinnitus, fullness) | Yes |
| D | Not better accounted for by another vestibular diagnosis | Yes |