Osmosis video - Acoustic neuroma (schwannoma)

Acoustic neuroma is a benign tumor that arises from the Schwann cells that surround the eighth cranial (vestibulocochlear) nerve. The symptoms of acoustic neuroma vary depending on the size and location of the tumor, but they can include hearing loss, tinnitus (ringing in the ears), dizziness, and facial weakness. The cause of acoustic neuroma is not fully understood, but it appears to be due to a combination of environmental and genetic factors.