As known as "acoustic neuroma"
Schwann cell derived tumor of cranial nerve VIII
Typically arise from vestibular division of CN VIII--> expands--> projects from internal auditory canal into cerebellopontine angle--> compresses CN VII and VIII
Less commonly, can continue to enlarge and compress cerebellum, brain stem, and CN V, IX, and/or XII
Less commonly, can continue to enlarge and compress cerebellum, brain stem, and CN V, IX, and/or XII
Vestibular schwannoma
Vestibular/otologic
Vestibular neuritis
Benign paroxysmal positional vertigo 
Labyrinthitis
Traumatic 
Vestibular papillomatosis
Infection