II. Etiologies: Infection

  1. Viral Labyrinthitis
    1. Mumps most common etiology (Vertigo uncommon)
  2. Bacterial Labyrinthitis (uncommon)
    1. Due to extension of Otitis Media or Cholesteatoma

III. Pathophysiology

  1. Not synonymous with Vestibular Neuronitis
  2. Local spread from middle ear infection or Meningitis
  3. Causes permanent damage to Cochlea, vestibular system

IV. Symptoms

  1. Vertigo is variably present
  2. Tinnitus may be present
  3. Severe and total Sensorineural Hearing Loss
    1. Distinguishes Labyrinthitis from Vestibular Neuronitis

V. Signs

  1. Nystagmus
  2. Ear exam normal

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