These patients are often diagnosed with tumors affecting both ears by the age of 30.Īcoustic neuromas are diagnosed with a detailed MRI and CT scan of the head if the patient presents with a decrease in hearing, tinnitus (ringing in the ear), dizziness or other common symptoms. NF2, the genetic variant, is a rare cause of these tumors accounting for only 5 percent of acoustic neuromas. Each year approximately 2,500-3,000 individuals in the United States are diagnosed with this tumor, which typically affects only one ear. Sporadic acoustic neuromas are the most common type. NF2 is a genetic, inherited disorder characterized by the growth of noncancerous tumors in the nervous system. There are two types of acoustic neuromas: a sporadic type and a type associated with a syndrome called neurofibromatosis type II (NF2). Acoustic neuromas can also be life threatening if they become large enough to compress the brain stem or cerebellum. Although these tumors do not invade the brain, they commonly cause hearing loss and can result in neurological deficits. This nerve, called the vestibulocochlear nerve, is involved in transmitting sound and sending balance information from the inner ear to the brain.Īcoustic neuromas are typically slow growing over a period of years. An acoustic neuroma (also known as a vestibular schwannoma) is a benign tumor that originates on the eighth cranial nerve, which connects the inner ear with the brain.
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