Nowadays, the development of science and technology is rapid, and the level of medical diagnosis and treatment is also changing rapidly, so the detection rate of various diseases that could not be detected early before is also increasing, because the early symptoms of some diseases are not very typical, and there is no way to do detailed examination in the past. Many patients (for example, intracranial tumors) only think of going to the hospital when their symptoms are obviously aggravated, and then they find that the tumor has grown very large and needs immediate surgery when they go to do some related examinations. Today, I would like to talk about an intracranial tumor that I often encounter in the clinic, called auditory neuroma. This is a benign tumor, which often has no obvious symptoms in the early stage, only tinnitus and slight hearing loss, and a small number of patients can have headache and dizziness. Auditory neuroma originates from the auditory nerve membrane, also known as auditory nerve syringomyelia, is a common benign tumor in the cerebellopontine horn of the cerebellum, mostly seen in middle-aged people aged 30-50, more women than men. 1.What are the common symptoms of auditory neuroma? The tumor will push or compress the auditory nerve, vestibular nerve and the accompanying internal auditory artery in the inner ear, affecting the blood supply to the inner ear, manifesting as unilateral slowly progressive (occasionally sudden) deafness, high pitched tinnitus, dizziness and unstable feeling. If the middle nerve and facial nerve are pushed, there will be pain in the ear, change in secretion of salivary gland and lacrimal gland, abnormal taste sensation in front of tongue, muscle weakness or paralysis, and facial muscle spasm. If the tumor is in contact with brainstem and cerebellum and pressurizes them, it may cause spontaneous nystagmus and ataxia. If the tumor is too large, it may cause obstruction of peripheral venous return, cerebrospinal fluid circulation and hydrocephalus, which may increase intracranial pressure and cause headache, nausea and vomiting. 2.What tests are needed for suspected auditory neuroma? (1) Hearing examination (2) Neurological examination Hearing examination mainly evaluates the damage of auditory nerve function and residual situation, and evaluates the feasibility of surgery Neuroradiological examination (1) CT and MRI examination: At present, the standard for diagnosis of auditory nerve sheath tumor is enhanced MRI, and enhanced MRI should be performed when the tumor is small (<1cm) or inside the internal auditory canal, and the CT scan is negative and the tumor is highly suspected. CT and MRI have complementary roles, as CT reveals enlargement of the internal auditory canal (a typical manifestation of auditory neuroma), and enhanced CT reveals the tumor, which is useful for estimating the degree of pneumatization of the temporal bone during the middle cranial fossa approach and the distance between the high jugular bulb and the posterior semicircular canal and floor. When auditory nerve sheath tumor or CT examination is difficult to determine, full sequence MRI can make the differential diagnosis. In addition, X-ray plain film can clarify the bone destruction, and cerebral angiography can show the image of blood vessels around the tumor and the blood supply of the tumor. 3.How should auditory neuroma be treated? If the size of the tumor is <1.0cm, it can be followed up and treated with γ-knife. If the tumor is larger and causes hearing loss (symptoms of auditory nerve), facial numbness, facial pain (symptoms of trigeminal neuralgia), facial palsy (symptoms of facial nerve damage), etc., surgery is preferred. The surgical treatment of auditory neuroma has been developed over a long period of time, and now it is not only for "removing the tumor", but also for ensuring the patient's quality of life and neurological function. It is worth mentioning that many patients with auditory neuroma already have unilateral deafness and hearing loss or facial palsy before surgery, so in order to preserve the nerve function to the greatest extent or not to produce new nerve damage, the surgery is very difficult and needs to be performed by doctors with rich experience in pontocerebellar angle surgery. We have accumulated rich clinical experience with more than 3,000 units of these surgeries, in order to provide the best treatment service for our patients. 4.What are the complications of the surgery? The surgery of auditory neuroma is a common operation in the pontocerebellar horn, but when the neurological function needs to be preserved, the operation becomes significantly more difficult. The common post-operative complications include facial palsy, facial numbness, choking on water, hoarseness and cerebrospinal fluid leakage. The surgical mortality rate reported in large cases has been extremely low, and in some cases even zero. In addition, improper separation of the adherent part of the brainstem can cause limb paralysis, and excessive pulling and separation injury of the cerebellum can cause cerebellar dysfunction.