Without surgery for acoustic neuroma, tumor enlargement may cause hearing loss with tinnitus, balance disorder, cerebellar symptoms, nerve involvement and other consequences, which may be life-threatening in serious cases. 1. Hearing loss with tinnitus: generally progressive hearing impairment with tinnitus; some patients show sudden hearing loss. If the tumor is not operated in time, it may cause complete hearing loss as the tumor continues to grow. 2. Balance disorder: if the tumor is not operated, vestibular dysfunction may occur, with symptoms of unsteady balance, dizziness and other discomforts. 3. Cerebellar symptoms: the enlargement of acoustic neuroma involving cerebellar dysfunction may lead to unsteady gait, ataxia and so on. 4. Damage to adjacent cerebral nerves: damage to trigeminal nerve may cause facial pain or hypesthesia; facial nerve paralysis, compression of posterior cerebral nerves: choking on drinking water, hoarseness, difficulty in swallowing. As the tumor increases in size it can cause increased intracranial pressure and even life-threatening brain hernia. Therefore, it is recommended to consult regular hospitals in time and standardized treatment by specialists when discovering acoustic neuroma.