Bilateral Acoustic Neurofibromatosis (BAN) is a rare genetic disorder that affects the nervous system. Also known as Neurofibromatosis Type 2, it causes the growth of noncancerous tumors on the nerves responsible for hearing and balance. Other synonyms for BAN include multiple acoustic neuromas, NF2, and central neurofibromatosis. While BAN can occur at any age, it typically appears in the teenage years or early adulthood. Symptoms range from tinnitus (ringing in the ears) to hearing loss and difficulty with balance, and can progress to vision problems and numbness or weakness in the limbs. Treatment options include surgery, radiation therapy, and medication management depending on the severity of the tumors and symptoms.