II. Etiologies: Infection
- Viral Labyrinthitis
-
Bacterial Labyrinthitis (uncommon)
- Due to extension of Otitis Media or Cholesteatoma
III. Pathophysiology
- Not synonymous with Vestibular Neuronitis
- Local spread from middle ear infection or Meningitis
- Causes permanent damage to Cochlea, vestibular system
IV. Symptoms
- Vertigo is variably present
- Tinnitus may be present
- Severe and total Sensorineural Hearing Loss
- Distinguishes Labyrinthitis from Vestibular Neuronitis
V. Signs
- Nystagmus
- Ear exam normal