Materiały źródłowe

• #1 Diagnosis and Management of Schwannomas Originating from the Cervical Vagus Nerve

  https://pmc.ncbi.nlm.nih.gov/articles/PMC4473416/

  A schwannoma is a benign, slow growing, encapsulated nerve sheath tumour. Presentation of a schwannoma is a diagnostic and management challenge. […] Preoperative diagnoses of schwannomas in the lateral part of the neck can cause confusion with its nerve of origin (ie whether it arises from the vagus nerve or a sympathetic chain). Computed tomography and magnetic resonance imaging reveal valuable information regarding the location and origin of the tumour as well as aiding surgical planning. The diagnosis can be confirmed intraoperatively. Histopathological studies searching for classical features and immunohistochemical staining for S100 also confirm the diagnosis. […] Schwannomas should be considered in the differential diagnoses of unusual masses in the neck. Preoperative imaging elicits valuable information regarding the location and origin of schwannomas and histopathology confirms the diagnosis.

• #2 Diagnosis and Management of Schwannomas Originating from the Cervical Vagus Nerve

  https://pmc.ncbi.nlm.nih.gov/articles/PMC4473416/

  The diagnosis of a schwannoma is problematic because the medical history and clinical examination are usually non-specific. Fine needle aspiration (FNA), magnetic resonance imaging (MRI) and computed tomography (CT) have, to a certain degree, solved the problem of misdiagnoses. In addition to facilitating the diagnosis, preoperative imaging provides information on the size, location and extent of the tumour as well as the surrounding anatomy, thereby aiding surgical planning. […] The usefulness of FNA is controversial. Most authors do not recommend open biopsy or FNA for these masses. […] On CT, schwannomas appear to be well covered, well defined and fusiform. They show relatively homogenous enhancement of contrast, with internal cystic changes becoming more prominent as the tumour enlarges.

• #3 Schwannoma: What It Is, Causes, Symptoms & Treatment

  https://my.clevelandclinic.org/health/diseases/17877-schwannoma

  A schwannoma is a tumor that develops from Schwann cells in your peripheral nervous system or nerve roots. […] The most common type is a vestibular schwannoma, which forms in a nerve in your inner ear. […] Schwannomas are almost always benign (noncancerous) but can sometimes be malignant (cancerous). […] A common area for schwannomas is in the nerve that connects your brain to your inner ear (vestibular schwannoma). […] The most common type of schwannoma, vestibular schwannoma, is considered a brain tumor. […] Schwannomas usually develop randomly in otherwise healthy people. […] Schwannomas grow slowly and may exist for years without any symptoms. […] If you’re experiencing symptoms, your healthcare provider will likely order imaging tests. […] Imaging tests that can help diagnose a schwannoma include: Magnetic resonance imaging (MRI), Computed tomography (CT) scan, Ultrasound.

• #4 Vestibular Schwannoma – Ear, Nose, and Throat Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/ear-nose-and-throat-disorders/inner-ear-disorders/vestibular-schwannoma

  A vestibular schwannoma (acoustic neuroma) is a Schwann cell-derived tumor of the 8th cranial nerve. […] Diagnosis is based on audiology and confirmed by MRI. […] Most commonly, an audiogram is the first test done to diagnose vestibular schwannoma. It usually detects an asymmetric sensorineural hearing loss and a greater impairment of speech discrimination than would be expected for the degree of hearing loss. Such findings indicate the need for imaging tests, preferably gadolinium-enhanced MRI. […] Other findings include presence of acoustic reflex decay on tympanometry. Auditory brain stem response testing may show the absence of waveforms and/or increased latency of the 5th waveform. […] Although not usually required in the routine evaluation of a patient with asymmetric sensorineural hearing loss, caloric testing shows marked vestibular hypoactivity (canal paresis) on the affected side.

• #5 Schwannoma | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/schwannoma?lang=us

  Schwannomas, less commonly called neurinomas or neurilemmomas, are benign tumors of Schwann cell origin and are the most common tumor of peripheral nerves, including cranial nerves. […] Presentation depends on the location of the tumor but generally, symptoms are due to local mass effect or dysfunction of the nerve they arise from. […] CT is not as sensitive or specific for the diagnosis of schwannoma as MRI but is often the first investigation obtained. […] Schwannomas have fairly predictable signal characteristics: T1 isointense or hypointense, T1 C+ (Gd) intense enhancement, T2 heterogeneously hyperintense. […] Surgery is the treatment of choice. As schwannomas do not infiltrate the parent nerve, they can usually be separated from it. Recurrence is unusual after complete resection. They rarely undergo malignant change.

• #6 Acoustic neuroma – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/acoustic-neuroma/diagnosis-treatment/drc-20356132

  A thorough physical exam, including an ear exam, is often the first step in acoustic neuroma diagnosis and treatment. […] An acoustic neuroma is often hard to diagnose in the early stages because symptoms may be easy to miss and develop slowly over time. Common symptoms such as hearing loss also are associated with many other middle and inner ear problems. […] After asking questions about your symptoms, a member of your health care team conducts an ear exam. You may need the following tests: […] Magnetic resonance imaging (MRI) with contrast dye is usually used to diagnose an acoustic neuroma. This imaging test can detect tumors as small as 1 to 2 millimeters in diameter. If MRI is not available or you can’t have an MRI scan, computerized tomography (CT) may be used. However, CT scans may miss small tumors.

• #7 Diagnosis and Management of Schwannomas Originating from the Cervical Vagus Nerve

  https://pmc.ncbi.nlm.nih.gov/articles/PMC4473416/

  MRI characteristics of schwannomas include specific signs (split fat, fascicular, target) and signal patterns (ie isointense T1 signal relative to skeletal muscle; increased and slightly heterogeneous T2 signals). […] As reported by Furukawa et al, MRI findings are also useful for preoperative estimation of the nerve of origin of schwannomas of the vagus nerve and schwannomas of the cervical sympathetic chain. […] Preoperative diagnoses based on imaging studies offer better understanding of the anatomical correlations between the nerve and vascular structures than intraoperative diagnoses. […] Schwannomas of the vagus nerve can be confused with metastatic lymph nodes, paragangliomas and schwannomas of the cervical sympathetic chain. […] Neither the diagnosis nor the treatment of schwannomas of the cervical vagus nerve are straightforward. Only appropriate imaging and preoperative planning ensure successful treatment of schwannomas.

• #8 EANO guideline on the diagnosis and treatment of vestibular schwannoma

  https://pmc.ncbi.nlm.nih.gov/articles/PMC6954440/

  The radiological diagnosis of vestibular schwannoma is made by magnetic resonance imaging. Histological verification of the diagnosis is not always required. […] This first guideline of the European Association of Neuro-Oncology (EANO) on the diagnosis, treatment, and follow-up of patients with vestibular schwannoma (VS) aims at guidance in an area where there is little evidence from controlled clinical trials, major variation of clinical practice across sites and countries, but urgent need for consensus and standard operating procedures. […] MRI is the method of choice for the identification of suspected VS, with contrast-enhanced T1-weighted scans considered to be the gold standard for the initial evaluation and postoperative assessment of recurrence or residual tumors. […] The diagnosis is made according to the World Health Organization (WHO) 2016 classification.

• #9 Guidelines on the Management of Patients with Vestibular Schwannoma

  https://www.cns.org/guidelines/management-patients-vestibular-schwannoma/5-role-of-imaging-in-diagnosis-management-of-patie

  Level 3: Imaging used to detect vestibular schwannomas should use high-resolution T2-weighted and contrast-enhanced T1-weighted MRI. […] Level 3: Standard T1, T2, FLAIR, and DWI MR sequences obtained in axial, coronal, and sagittal plane may be used for detection of vestibular schwannomas. […] Level 3: Preoperative surveillance for growth of a vestibular schwannoma should be followed with either contrast-enhanced 3D T1 MPRAGE or high-resolution T2 (including CISS or FIESTA sequences) MR imaging. […] Level 2: Postoperative evaluation should be performed with post-contrast 3D T1 MPRAGE, with nodular enhancement considered suspicious for recurrence. […] Level 3: T2-weighted MRI may be used to augment visualization of the facial nerve course as part of preoperative evaluation. […] Level 3: MRIs should be obtained annually for 5 years, with interval lengthening thereafter with tumor stability.

• #10 Schwannoma | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/schwannoma?lang=us

  Schwannomas, less commonly called neurinomas or neurilemmomas, are benign tumors of Schwann cell origin and are the most common tumor of peripheral nerves, including cranial nerves. […] Presentation depends on the location of the tumor but generally, symptoms are due to local mass effect or dysfunction of the nerve they arise from. […] CT is not as sensitive or specific for the diagnosis of schwannoma as MRI but is often the first investigation obtained. […] Schwannomas have fairly predictable signal characteristics: T1 isointense or hypointense, T1 C+ (Gd) intense enhancement, T2 heterogeneously hyperintense. […] Surgery is the treatment of choice. As schwannomas do not infiltrate the parent nerve, they can usually be separated from it. Recurrence is unusual after complete resection. They rarely undergo malignant change.

• #11 Neurilemmoma (Schwannoma) Workup: Imaging Studies, Biopsy, Histologic Findings

  https://emedicine.medscape.com/article/1256405-workup

  Findings on plain radiography generally are not specific for neurilemmoma (neurilemoma; also referred to as schwannoma). The rare intraosseous lesion presents as a benign-appearing, well-circumscribed lesion. […] Special studies to consider include computed tomography (CT) and magnetic resonance imaging (MRI). MRI is particularly useful; it shows a usually round or oval mass with a moderately bright signal on T1-weighted images and a bright, heterogeneous signal on T2-weighted images. […] Neurilemmomas have very distinctive appearances on magnetic resonance images. Many investigators believe that the presence of a target sign on a peripheral nerve is diagnostic for a neurilemmoma. […] Wu et al conducted a study to determine the value of ultrasonography (US) in the diagnosis of neurilemmoma and to determine whether the presence of a round or roundlike shape on the ultrasound image is diagnostically useful. They concluded that US is capable of diagnosing neurilemmomas with a high degree of accuracy but that round or roundlike shape and the ratio of longitudinal maximal diameter to short maximal diameter (L/S) are of little value in identifying neurilemmomas of the limbs.

• #12 Diagnosis of plexiform schwannoma of the foot in a 66-year-old male: a case report and literature review – Ieong – AME Case Reports

  https://acr.amegroups.org/article/view/5930/html

  Ultrasound is used to distinguish schwannoma from other soft tissue tumors, although it cannot differentiate the schwannoma, neurofibroma and malignant peripheral schwannoma. […] MRI has the characteristics of high-resolution and multi-plane imaging. […] At diagnosis by MRI, plexiform schwannoma should be differentiated from plexiform neurofibroma, lipoma, hemangioma and myxoma. […] CT is not as sensitive or specific as MRI in the diagnosis of schwannoma, but it is often used for preliminary detection and obtain the preliminary results. […] In this case, the patient was performed the ultrasound at first but the typical characteristics of plexiform schwannoma were not seen. […] The final pathological examination confirmed the diagnosis. […] These radiological modalities can be combined for diagnosis of plexiform schwannoma, but the final diagnosis should be based on pathology.

• #13 Spinal Schwannoma Diagnosis & Treatment – NYC | Columbia Neurosurgery in New York City

  https://www.neurosurgery.columbia.edu/patient-care/conditions/spinal-schwannoma

  Schwannomas are nerve sheath tumors, or tumors that originate from the layer of insulation that surrounds nerve fibers. At the Spine Hospital at the Neurological Institute of New York, we specialize in treating spinal schwannomas. […] Imaging studies usually provide the diagnosis of spinal schwannomas. Magnetic resonance (MR) scans, for example, use magnets, radio waves, and computer technology to produce images of organs and tissues like the brain and spinal cord. MR scans can identify spinal schwannomas as small as a few millimeters. […] MR scans are sometimes performed using a contrast-enhancing agent—a material like a dye that makes some tumors light up brightly. The contrast-enhancing agent is delivered intravenously (through an IV) before the MR scan is performed. Most schwannomas enhance with contrast administration. Other intradural tumors, such as meningiomas and myxopapillary ependymomas, may have a similar appearance to schwannoma on MR imaging.

• #14 Vestibular Schwannomas: Diagnosis and Surgical Treatment | IntechOpen

  https://www.intechopen.com/chapters/64569

  Very often these symptoms are not adequately investigated, and it is a common cause to miss the diagnosis. […] Hydrocephalus is relatively common in VS patients. […] Magnetic resonance imaging (MRI) is the eligible test to diagnose and evaluate patients with a vestibular schwannomas. […] T1, T2, FLAIR, and DWI images are usually sufficient for the diagnosis. […] When a watchful waiting is decided, MRI volumetric studies have an excellent accuracy to follow tumor growth. […] Meningiomas are the most frequent differential diagnosis between non-schwannomatous lesions that arise or protrude into the IAC.

• #15 Schwannoma | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/schwannoma?lang=us

  Schwannomas, less commonly called neurinomas or neurilemmomas, are benign tumors of Schwann cell origin and are the most common tumor of peripheral nerves, including cranial nerves. […] Presentation depends on the location of the tumor but generally, symptoms are due to local mass effect or dysfunction of the nerve they arise from. […] CT is not as sensitive or specific for the diagnosis of schwannoma as MRI but is often the first investigation obtained. […] Schwannomas have fairly predictable signal characteristics: T1 isointense or hypointense, T1 C+ (Gd) intense enhancement, T2 heterogeneously hyperintense. […] Surgery is the treatment of choice. As schwannomas do not infiltrate the parent nerve, they can usually be separated from it. Recurrence is unusual after complete resection. They rarely undergo malignant change.

• #16 Diagnosis and Management of Schwannomas Originating from the Cervical Vagus Nerve

  https://pmc.ncbi.nlm.nih.gov/articles/PMC4473416/

  The diagnosis of a schwannoma is problematic because the medical history and clinical examination are usually non-specific. Fine needle aspiration (FNA), magnetic resonance imaging (MRI) and computed tomography (CT) have, to a certain degree, solved the problem of misdiagnoses. In addition to facilitating the diagnosis, preoperative imaging provides information on the size, location and extent of the tumour as well as the surrounding anatomy, thereby aiding surgical planning. […] The usefulness of FNA is controversial. Most authors do not recommend open biopsy or FNA for these masses. […] On CT, schwannomas appear to be well covered, well defined and fusiform. They show relatively homogenous enhancement of contrast, with internal cystic changes becoming more prominent as the tumour enlarges.

• #17 Acoustic neuroma – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/acoustic-neuroma/diagnosis-treatment/drc-20356132

  A thorough physical exam, including an ear exam, is often the first step in acoustic neuroma diagnosis and treatment. […] An acoustic neuroma is often hard to diagnose in the early stages because symptoms may be easy to miss and develop slowly over time. Common symptoms such as hearing loss also are associated with many other middle and inner ear problems. […] After asking questions about your symptoms, a member of your health care team conducts an ear exam. You may need the following tests: […] Magnetic resonance imaging (MRI) with contrast dye is usually used to diagnose an acoustic neuroma. This imaging test can detect tumors as small as 1 to 2 millimeters in diameter. If MRI is not available or you can’t have an MRI scan, computerized tomography (CT) may be used. However, CT scans may miss small tumors.

• #18 NYC Spinal Schwannomas Treatments & Diagnosis | Och Spine at NewYork-Presbyterian at the Weill Cornell Medicine Center for Comprehensive Spine Care

  https://comprehensivespine.weillcornell.org/conditions-we-treat/spinal-schwannomas/diagnosing-and-treating-spinal-schwannomas/

  A doctor will begin with a thorough history of the patient and physical exam. If a doctor believes a spinal tumor may be present, the following tests may be ordered: […] An x-ray can show which area of the spine has been affected. […] Computerized tomography (CT) is a noninvasive procedure that uses x-rays to produce a three-dimensional image of the spine. A CT shows more detail than an X-ray, and can identify the bones in greater detail, and show the nerves, spinal cord, and any possible damage to them. […] An MRI uses magnetic fields and radio-frequency waves to create an image of the spine and can reveal fine details of the spine, including tumors, nerves, and other details. An MRI scan can show details in the spine that cant normally be seen on an x-ray. […] Removal of the schwannoma via surgery may be the best option to not only remove the growth but also relieve pressure on the spine and nerves that it is causing.

• #19 The “Tail Sign” in Intramuscular Schwannoma | Journal of the Belgian Society of Radiology

  https://jbsr.be/articles/10.5334/jbsr.2157

  This case emphasizes the importance of the tail sign to sort the differential diagnosis of soft tissue tumors by highly suggesting schwannoma. […] The diagnosis of a small benign schwannoma was confirmed at surgery, which lead to complete resection and uneventful recovery. […] But, when it is possible to depict the relation of a mass with entering and exiting nerve (the tail sign), hypothesis of a neurogenic tumor should be contemplated. […] This case emphasizes the usefulness of the tail sign on all imaging modalities to sort the differential diagnosis of soft-tissue masses by suggesting peripheral nerve tumor.

• #20 Neurilemmoma (Schwannoma) Workup: Imaging Studies, Biopsy, Histologic Findings

  https://emedicine.medscape.com/article/1256405-workup

  Yuan et al, in a study assessing the diagnostic accuracy of multiparametric US for evaluating signs of peripheral nerve schwannoma, determined that excellent accuracy could be achieved by combining two-dimensional (2D) imaging, color flow imaging, and elastography. US signs specific to peripheral schwannoma included polar blood supply sign and target sign on elastography.

• #21 Diagnosis of plexiform schwannoma of the foot in a 66-year-old male: a case report and literature review – Ieong – AME Case Reports

  https://acr.amegroups.org/article/view/5930/html

  Ultrasound is used to distinguish schwannoma from other soft tissue tumors, although it cannot differentiate the schwannoma, neurofibroma and malignant peripheral schwannoma. […] MRI has the characteristics of high-resolution and multi-plane imaging. […] At diagnosis by MRI, plexiform schwannoma should be differentiated from plexiform neurofibroma, lipoma, hemangioma and myxoma. […] CT is not as sensitive or specific as MRI in the diagnosis of schwannoma, but it is often used for preliminary detection and obtain the preliminary results. […] In this case, the patient was performed the ultrasound at first but the typical characteristics of plexiform schwannoma were not seen. […] The final pathological examination confirmed the diagnosis. […] These radiological modalities can be combined for diagnosis of plexiform schwannoma, but the final diagnosis should be based on pathology.

• #22 Schwannoma of Foot and Ankle: Seven Case Reports and Literature Review | Anticancer Research

  https://ar.iiarjournals.org/content/39/9/5185

  The modalities of pre-surgical diagnosis include X-ray radiography, ultrasound and MRI. […] MRI is the most valuable tool for evaluating schwannoma, not only for location, size and texture, but also for relationships with nerves and other surrounding anatomical structures. […] Surgical excision or enucleation is the primary treatment option, even though for a smaller tumor observation can be opted for. […] Recurrence is extremely rare (less than 1%) unless tumor tissue is incompletely excised. […] Schwannoma on the foot is a rare tumor. […] Ultrasound and MRI are good diagnostic tools for revealing tumor location, size, texture, involved nerves and relationships with surrounding muscular structures.

• #23 Schwannoma – Overview – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/schwannoma/cdc-20352974

  Electromyogram (EMG). For this test, your doctor places small needles in your muscles so an electromyography instrument can record the electrical activity in your muscle as you try to move it. […] Nerve conduction study. You’re likely to have this test along with your EMG. It measures how quickly your nerves carry electrical signals to your muscles. […] Tumor biopsy. If imaging tests identify a nerve tumor, your doctor may remove and analyze a small sample of cells (biopsy) from your tumor. Depending on the tumor’s size and location, you may need local or general anesthesia during the biopsy. […] Nerve biopsy. If you have a condition such as progressive peripheral neuropathy or enlarged nerves that mimic nerve tumors, your doctor may take a nerve biopsy.

• #24 Schwannoma – Overview – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/schwannoma/cdc-20352974

  Electromyogram (EMG). For this test, your doctor places small needles in your muscles so an electromyography instrument can record the electrical activity in your muscle as you try to move it. […] Nerve conduction study. You’re likely to have this test along with your EMG. It measures how quickly your nerves carry electrical signals to your muscles. […] Tumor biopsy. If imaging tests identify a nerve tumor, your doctor may remove and analyze a small sample of cells (biopsy) from your tumor. Depending on the tumor’s size and location, you may need local or general anesthesia during the biopsy. […] Nerve biopsy. If you have a condition such as progressive peripheral neuropathy or enlarged nerves that mimic nerve tumors, your doctor may take a nerve biopsy.

• #25 Schwannoma | Health Library | Memorial Health System

  https://www.mhsystem.org/health-library/con-20308116/

  Electromyogram (EMG). For this test, your doctor places small needles in your muscles so an electromyography instrument can record the electrical activity in your muscle as you try to move it. […] Nerve conduction study. Youre likely to have this test along with your EMG. It measures how quickly your nerves carry electrical signals to your muscles. […] Tumor biopsy. If imaging tests identify a nerve tumor, your doctor may remove and analyze a small sample of cells (biopsy) from your tumor. […] Nerve biopsy. If you have a condition such as progressive peripheral neuropathy or enlarged nerves that mimic nerve tumors, your doctor may take a nerve biopsy.

• #26 Vestibular Schwannoma – Ear, Nose, and Throat Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/ear-nose-and-throat-disorders/inner-ear-disorders/vestibular-schwannoma

  A vestibular schwannoma (acoustic neuroma) is a Schwann cell-derived tumor of the 8th cranial nerve. […] Diagnosis is based on audiology and confirmed by MRI. […] Most commonly, an audiogram is the first test done to diagnose vestibular schwannoma. It usually detects an asymmetric sensorineural hearing loss and a greater impairment of speech discrimination than would be expected for the degree of hearing loss. Such findings indicate the need for imaging tests, preferably gadolinium-enhanced MRI. […] Other findings include presence of acoustic reflex decay on tympanometry. Auditory brain stem response testing may show the absence of waveforms and/or increased latency of the 5th waveform. […] Although not usually required in the routine evaluation of a patient with asymmetric sensorineural hearing loss, caloric testing shows marked vestibular hypoactivity (canal paresis) on the affected side.

• #27 Vestibular Schwannoma – Ear, Nose, and Throat Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/ear-nose-and-throat-disorders/inner-ear-disorders/vestibular-schwannoma

  A vestibular schwannoma (acoustic neuroma) is a Schwann cell-derived tumor of the 8th cranial nerve. […] Diagnosis is based on audiology and confirmed by MRI. […] Most commonly, an audiogram is the first test done to diagnose vestibular schwannoma. It usually detects an asymmetric sensorineural hearing loss and a greater impairment of speech discrimination than would be expected for the degree of hearing loss. Such findings indicate the need for imaging tests, preferably gadolinium-enhanced MRI. […] Other findings include presence of acoustic reflex decay on tympanometry. Auditory brain stem response testing may show the absence of waveforms and/or increased latency of the 5th waveform. […] Although not usually required in the routine evaluation of a patient with asymmetric sensorineural hearing loss, caloric testing shows marked vestibular hypoactivity (canal paresis) on the affected side.

• #28 Vestibular Schwannoma – Ear, Nose, and Throat Disorders – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/ear-nose-and-throat-disorders/inner-ear-disorders/vestibular-schwannoma

  A vestibular schwannoma (also called an acoustic neuroma) is a noncancerous (benign) tumor that originates in the cells that wrap around the vestibular nerve (Schwann cells). […] To diagnose vestibular schwannoma doctors usually do an audiogram (a hearing test) first. If hearing is lost in only one ear, MRI, preferably gadolinium-enhanced MRI, is then done. […] Other hearing tests that may be done include tympanometry (tests how well sound can pass through the eardrum and middle ear) and auditory brain stem response testing (measures nerve impulses in the brain stem resulting from sound signals in the ears).

• #29 Vestibular Schwannoma – Ear, Nose, and Throat Disorders – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/ear-nose-and-throat-disorders/inner-ear-disorders/vestibular-schwannoma

  A vestibular schwannoma (acoustic neuroma) is a Schwann cell-derived tumor of the 8th cranial nerve. […] Diagnosis is based on audiology and confirmed by MRI. […] Most commonly, an audiogram is the first test done to diagnose vestibular schwannoma. It usually detects an asymmetric sensorineural hearing loss and a greater impairment of speech discrimination than would be expected for the degree of hearing loss. Such findings indicate the need for imaging tests, preferably gadolinium-enhanced MRI. […] Other findings include presence of acoustic reflex decay on tympanometry. Auditory brain stem response testing may show the absence of waveforms and/or increased latency of the 5th waveform. […] Although not usually required in the routine evaluation of a patient with asymmetric sensorineural hearing loss, caloric testing shows marked vestibular hypoactivity (canal paresis) on the affected side.

• #30 Vestibular Schwannoma, Acoustic Neuroma, Common Findings for Diagnosis

  https://hearinghealthmatters.org/dizziness-depot/2023/vestibular-schwannoma-acoustic-neuroma-common-findings-for-an-uncommon-diagnosis/

  A vestibular schwannoma is a benign, slow-growing tumor, most often arising from the vestibular nerve and typically only affecting one side. A tumor in a small space, such as in the internal auditory canal, can compress the auditory and/or vestibular nerves causing unilateral auditory and vestibular symptoms. […] The diagnosis of a vestibular schwannoma/acoustic neuroma is most typically made with the combination of an MRI, conventional audiogram, vestibular testing and auditory brainstem response testing. Individuals with vestibular schwannoma typically have unilaterally abnormal test results, making tests that independently assess the right and left sides more useful than those that assess both sides in conjunction. […] This patient’s test findings were a hallmark presentation of a vestibular schwannoma in that measures of auditory function were asymmetric, reduced or absent on the affected side. As is consistent with a central vestibular compensation process, vestibular function measures that individually assessed each side were grossly abnormal, while measures that assessed overall VOR function were normal. Vestibular schwannoma is a relatively rare finding and often times the auditory and vestibular functions tests performed with these patients do not present this clearly.

• #31 Vestibular schwannoma: evolution of diagnosis and treatment | Egyptian Journal of Neurosurgery | Full Text

  https://ejns.springeropen.com/articles/10.1186/s41984-025-00349-1

  Today, screening for VS may start with audiologic assessment (pure-tone audiogram and speech discrimination scoring) but the gold standard for diagnosis remains thin-slice gadolinium-enhanced T1-weighted MRI of internal acoustic meatus and CPA. […] After diagnosis, multiple treatment options are possible such as observational wait-and-scan, stereotactic radiosurgery, microsurgery, or combination. Each strategy has advantages and limitations. […] The advancements in stereotactic radiotherapy have provided non-invasive alternatives to surgery with good long-term tumor control though there is still lack of high-quality randomized controlled trials comparing surgical and radiotherapy options. […] Targeted molecular therapies have also provided alternative treatment options for refractory and rapidly growing tumors. Future directions in VS research may include advancements in the fields of cytogenetics, epigenetics, proteomics, and molecular biology.

• #32 Schwannoma – Overview – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/schwannoma/cdc-20352974

  Electromyogram (EMG). For this test, your doctor places small needles in your muscles so an electromyography instrument can record the electrical activity in your muscle as you try to move it. […] Nerve conduction study. You’re likely to have this test along with your EMG. It measures how quickly your nerves carry electrical signals to your muscles. […] Tumor biopsy. If imaging tests identify a nerve tumor, your doctor may remove and analyze a small sample of cells (biopsy) from your tumor. Depending on the tumor’s size and location, you may need local or general anesthesia during the biopsy. […] Nerve biopsy. If you have a condition such as progressive peripheral neuropathy or enlarged nerves that mimic nerve tumors, your doctor may take a nerve biopsy.

• #33 Schwannoma – Symptoms, Causes, TreatmentsSecond Opinion IconGroup 9Group 49

  https://www.barrowneuro.org/condition/schwannoma/

  Schwannoma Diagnosis […] Diagnostic imaging—typically computed tomography (CT) or magnetic resonance imaging (MRI)—confirms the presence of a schwannoma tumor and looks for indications that it may have spread to other parts of the body. […] While a provider may suspect a schwannoma based on CT or MRI images alone, a biopsy is still required to provide a definitive diagnosis. This requires taking a small sample from the tumor with a needle to be studied by a neuropathologist.

• #34 Diagnosis and Management of Schwannomas Originating from the Cervical Vagus Nerve

  https://pmc.ncbi.nlm.nih.gov/articles/PMC4473416/

  The diagnosis of a schwannoma is problematic because the medical history and clinical examination are usually non-specific. Fine needle aspiration (FNA), magnetic resonance imaging (MRI) and computed tomography (CT) have, to a certain degree, solved the problem of misdiagnoses. In addition to facilitating the diagnosis, preoperative imaging provides information on the size, location and extent of the tumour as well as the surrounding anatomy, thereby aiding surgical planning. […] The usefulness of FNA is controversial. Most authors do not recommend open biopsy or FNA for these masses. […] On CT, schwannomas appear to be well covered, well defined and fusiform. They show relatively homogenous enhancement of contrast, with internal cystic changes becoming more prominent as the tumour enlarges.

• #35 Diagnosis and Management of Schwannomas Originating from the Cervical Vagus Nerve

  https://pmc.ncbi.nlm.nih.gov/articles/PMC4473416/

  The diagnosis of a schwannoma is problematic because the medical history and clinical examination are usually non-specific. Fine needle aspiration (FNA), magnetic resonance imaging (MRI) and computed tomography (CT) have, to a certain degree, solved the problem of misdiagnoses. In addition to facilitating the diagnosis, preoperative imaging provides information on the size, location and extent of the tumour as well as the surrounding anatomy, thereby aiding surgical planning. […] The usefulness of FNA is controversial. Most authors do not recommend open biopsy or FNA for these masses. […] On CT, schwannomas appear to be well covered, well defined and fusiform. They show relatively homogenous enhancement of contrast, with internal cystic changes becoming more prominent as the tumour enlarges.

• #36 Schwannoma – NCI

  https://www.cancer.gov/pediatric-adult-rare-tumor/rare-tumors/rare-soft-tissue-tumors/schwannoma

  How is schwannoma diagnosed? […] If you have symptoms of schwannoma, your doctor will use scans such as CT and MRI to see where the tumor is in the body and how big it is. […] To check if the tumor is schwannoma, your doctor may do a biopsy, taking a small sample from the tumor with a needle. An expert, called a pathologist, will study cells from the sample under the microscope and run other tests to see what kind of tumor it is. […] The prognosis for a person with schwannoma depends on the size of the tumor and whether it has spread to other parts of the body. Depending on where the tumor is, people may have long term muscle weakness or hearing loss. If the entire tumor is removed by surgery, it is not likely to grow back.

• #37 Current status of the diagnosis and treatment of gastrointestinal schwannoma (Review)

  https://www.spandidos-publications.com/10.3892/ol.2021.12645

  Endoscopic ultrasound-guided biopsy is currently an important examination for the preoperative diagnosis of gastrointestinal tumors, especially submucosal tumors, and increases the chances of preoperative diagnosis by 10%. […] Immunohistochemical examination is the gold standard for diagnosing GIS. […] Positivity for S-100 is the gold standard for diagnosing GIS. […] Complete surgical removal of the tumor is the main method of treatment for GIS.

• #38 Current status of the diagnosis and treatment of gastrointestinal schwannoma (Review)

  https://www.spandidos-publications.com/10.3892/ol.2021.12645

  Endoscopic ultrasound-guided biopsy is currently an important examination for the preoperative diagnosis of gastrointestinal tumors, especially submucosal tumors, and increases the chances of preoperative diagnosis by 10%. […] Immunohistochemical examination is the gold standard for diagnosing GIS. […] Positivity for S-100 is the gold standard for diagnosing GIS. […] Complete surgical removal of the tumor is the main method of treatment for GIS.

• #39 Final Diagnosis — Case 868

  https://path.upmc.edu/cases/case868/dx.html

  FINAL DIAGNOSIS SCHWANNOMA […] Permanent sections demonstrated classic features confirming the diagnosis of schwannoma […] The current case is notable not because schwannomas are rare or difficult to diagnose, but rather because the classic morphological features of this tumor were clearly apparent within the FNA specimen […] The defining histomorphologic features of schwannomas are eponymously named after the individuals who described them during the process of classification […] Once these features were described and this distinctive entity could be reliably distinguished histopathologically from other nerve-associated tumors, they were renamed „neurilemmoma.” […] It was not until ultrastructural studies by electron microscopy in the 1960s that the Schwann cell was identified as the cell of origin for the tumor, and the name „schwannoma” was coined.

• #40 Final Diagnosis — Case 868

  https://path.upmc.edu/cases/case868/dx.html

  Notably, bilateral „vestibular schwannomas” are one of the hallmark features of Neurofibromatosis 2 […] Mutations in the NF2 gene, which encodes merlin, a membrane-associated tumor-suppressor protein, underlie both syndromic as well as sporadic schwannomas. […] The most important differential is with malignant peripheral nerve sheath tumor (MPNST), which, as the name suggests, is much more aggressive clinically. […] In contrast, despite having seemingly worrisome nuclear features, „ancient” schwannomas are benign. […] Other peripheral nerve sheath tumors such as neurofibroma, perineurioma or traumatic neuroma can be excluded by the lack of axonal elements within the tumor or the lack of strong S100 staining by immunohistochemistry.

• #41 Schwannoma vs Neurofibroma: A Patient’s Guide to the Difference

  https://www.ctbta.org/news/blog/schwannoma-vs-neurofibroma-patients-guide-difference

  Schwannomas typically develop in the cranial nerves, spinal nerves, and peripheral nerves. Their growth is usually slow, and they often remain undetected until they reach a size that causes noticeable symptoms. […] Diagnosing Schwannoma involves a combination of methods. Physicians usually start with a physical examination, followed by imaging tests such as MRI or CT scans. […] In some cases, a biopsy may be performed to confirm the diagnosis, though this is less common due to the risk of nerve damage. […] Neurofibroma symptoms are diverse, depending on the tumor’s size and location. Common signs include small bumps on or under the skin, pain or tingling, and in some cases, changes in skin color over the tumor. […] For diagnosis, doctors typically start with a physical exam, checking the skin and feeling for lumps. If Neurofibroma is suspected, imaging tests are crucial to see the tumors and understand their impact on surrounding tissues.

• #42 Diagnosis and Management of Schwannomas Originating from the Cervical Vagus Nerve

  https://pmc.ncbi.nlm.nih.gov/articles/PMC4473416/

  MRI characteristics of schwannomas include specific signs (split fat, fascicular, target) and signal patterns (ie isointense T1 signal relative to skeletal muscle; increased and slightly heterogeneous T2 signals). […] As reported by Furukawa et al, MRI findings are also useful for preoperative estimation of the nerve of origin of schwannomas of the vagus nerve and schwannomas of the cervical sympathetic chain. […] Preoperative diagnoses based on imaging studies offer better understanding of the anatomical correlations between the nerve and vascular structures than intraoperative diagnoses. […] Schwannomas of the vagus nerve can be confused with metastatic lymph nodes, paragangliomas and schwannomas of the cervical sympathetic chain. […] Neither the diagnosis nor the treatment of schwannomas of the cervical vagus nerve are straightforward. Only appropriate imaging and preoperative planning ensure successful treatment of schwannomas.

• #43 Schwannoma vs Neurofibroma: A Patient’s Guide to the Difference

  https://www.ctbta.org/news/blog/schwannoma-vs-neurofibroma-patients-guide-difference

  Schwannomas typically develop in the cranial nerves, spinal nerves, and peripheral nerves. Their growth is usually slow, and they often remain undetected until they reach a size that causes noticeable symptoms. […] Diagnosing Schwannoma involves a combination of methods. Physicians usually start with a physical examination, followed by imaging tests such as MRI or CT scans. […] In some cases, a biopsy may be performed to confirm the diagnosis, though this is less common due to the risk of nerve damage. […] Neurofibroma symptoms are diverse, depending on the tumor’s size and location. Common signs include small bumps on or under the skin, pain or tingling, and in some cases, changes in skin color over the tumor. […] For diagnosis, doctors typically start with a physical exam, checking the skin and feeling for lumps. If Neurofibroma is suspected, imaging tests are crucial to see the tumors and understand their impact on surrounding tissues.

• #44 Diagnosis and Management of Schwannomas Originating from the Cervical Vagus Nerve

  https://pmc.ncbi.nlm.nih.gov/articles/PMC4473416/

  MRI characteristics of schwannomas include specific signs (split fat, fascicular, target) and signal patterns (ie isointense T1 signal relative to skeletal muscle; increased and slightly heterogeneous T2 signals). […] As reported by Furukawa et al, MRI findings are also useful for preoperative estimation of the nerve of origin of schwannomas of the vagus nerve and schwannomas of the cervical sympathetic chain. […] Preoperative diagnoses based on imaging studies offer better understanding of the anatomical correlations between the nerve and vascular structures than intraoperative diagnoses. […] Schwannomas of the vagus nerve can be confused with metastatic lymph nodes, paragangliomas and schwannomas of the cervical sympathetic chain. […] Neither the diagnosis nor the treatment of schwannomas of the cervical vagus nerve are straightforward. Only appropriate imaging and preoperative planning ensure successful treatment of schwannomas.

• #45 Vestibular Schwannomas: Diagnosis and Surgical Treatment | IntechOpen

  https://www.intechopen.com/chapters/64569

  Very often these symptoms are not adequately investigated, and it is a common cause to miss the diagnosis. […] Hydrocephalus is relatively common in VS patients. […] Magnetic resonance imaging (MRI) is the eligible test to diagnose and evaluate patients with a vestibular schwannomas. […] T1, T2, FLAIR, and DWI images are usually sufficient for the diagnosis. […] When a watchful waiting is decided, MRI volumetric studies have an excellent accuracy to follow tumor growth. […] Meningiomas are the most frequent differential diagnosis between non-schwannomatous lesions that arise or protrude into the IAC.

• #46 Diagnosis and Management of Schwannomas Originating from the Cervical Vagus Nerve

  https://pmc.ncbi.nlm.nih.gov/articles/PMC4473416/

  MRI characteristics of schwannomas include specific signs (split fat, fascicular, target) and signal patterns (ie isointense T1 signal relative to skeletal muscle; increased and slightly heterogeneous T2 signals). […] As reported by Furukawa et al, MRI findings are also useful for preoperative estimation of the nerve of origin of schwannomas of the vagus nerve and schwannomas of the cervical sympathetic chain. […] Preoperative diagnoses based on imaging studies offer better understanding of the anatomical correlations between the nerve and vascular structures than intraoperative diagnoses. […] Schwannomas of the vagus nerve can be confused with metastatic lymph nodes, paragangliomas and schwannomas of the cervical sympathetic chain. […] Neither the diagnosis nor the treatment of schwannomas of the cervical vagus nerve are straightforward. Only appropriate imaging and preoperative planning ensure successful treatment of schwannomas.

• #47 Final Diagnosis — Case 868

  https://path.upmc.edu/cases/case868/dx.html

  Notably, bilateral „vestibular schwannomas” are one of the hallmark features of Neurofibromatosis 2 […] Mutations in the NF2 gene, which encodes merlin, a membrane-associated tumor-suppressor protein, underlie both syndromic as well as sporadic schwannomas. […] The most important differential is with malignant peripheral nerve sheath tumor (MPNST), which, as the name suggests, is much more aggressive clinically. […] In contrast, despite having seemingly worrisome nuclear features, „ancient” schwannomas are benign. […] Other peripheral nerve sheath tumors such as neurofibroma, perineurioma or traumatic neuroma can be excluded by the lack of axonal elements within the tumor or the lack of strong S100 staining by immunohistochemistry.

• #48 Diagnosis and management of retroperitoneal ancient schwannomas | World Journal of Surgical Oncology | Full Text

  https://wjso.biomedcentral.com/articles/10.1186/1477-7819-7-12

  Ancient schwannomas are degenerate peripheral nerve sheath tumors that very rarely occur in the retroperitoneum. […] We describe three cases of retroperitoneal ancient schwannomas and discuss the diagnosis and management of these tumors. […] A diagnosis of ancient schwannoma should be entertained for any heterogeneous, well encapsulated mass in the retroperitoneum. […] Malignant transformation is extremely rare and recurrences are uncommon following surgical resection. […] There is a tendency to confuse ancient schwannomas with malignant tumors on imaging and histology. […] If a diagnosis of ancient schwannoma is entertained based on imaging and histology, then consideration for less radical surgery may be appropriate in selected cases.

• #49 Schwannomatosis – Children’s Tumor Foundation

  https://www.ctf.org/swn/

  How is schwannomatosis diagnosed? […] The former diagnostic criteria for schwannomatosis (and NF2-SWN) classified patients primarily based on clinical features, however, it is now apparent that the manifestations of these diseases span the same continuum. For this reason, schwannomatosis no longer defines a distinct syndrome, but is now used as an umbrella term to describe the overlapping conditions in which a patient has many schwannomas. […] Healthcare providers use a list of diagnostic criteria (a checklist of signs and symptoms) to determine whether or not a patient may be given a diagnosis of a disorder or disease. A doctor will have to ask the patient many questions and thoroughly examine the individuals body to determine whether the criteria is met. Often, a patient will be asked to have genetic testing using a blood or saliva sample, or to have all or part of a tumor removed so that it can be viewed under a microscope.

• #50 Final Diagnosis — Case 868

  https://path.upmc.edu/cases/case868/dx.html

  Notably, bilateral „vestibular schwannomas” are one of the hallmark features of Neurofibromatosis 2 […] Mutations in the NF2 gene, which encodes merlin, a membrane-associated tumor-suppressor protein, underlie both syndromic as well as sporadic schwannomas. […] The most important differential is with malignant peripheral nerve sheath tumor (MPNST), which, as the name suggests, is much more aggressive clinically. […] In contrast, despite having seemingly worrisome nuclear features, „ancient” schwannomas are benign. […] Other peripheral nerve sheath tumors such as neurofibroma, perineurioma or traumatic neuroma can be excluded by the lack of axonal elements within the tumor or the lack of strong S100 staining by immunohistochemistry.

• #51 Diagnosis & Treatment – Neurofibromatosis Program

  https://www.uab.edu/medicine/nfprogram/learn-about-nf/schwannomatosis/diagnosis-treatment

  Because schwannomatosis can be difficult to diagnose, its important to know that an accurate diagnosis of the disorder can only be made by a physician with expertise in the diagnosis and treatment of neurofibromatosis. Specific diagnostic criteria have been established based on a consensus of experts. […] Genetic testing is available for the SMARCB1 gene mutation, which is associated with some cases of schwannomatosis. Testing is also offered for another recently identified gene, LZTR1, responsible for some cases. At present, genetic testing does not reveal a mutation in all affected individuals, and there may be additional genes responsible for the disorder in some people yet to be discovered. However, the genetics and inheritance of schwannomatosis is more complex and less clear than for NF1 and NF2. A genetic counselor can provide guidance and information regarding the suitability of genetic testing.

• #52 Schwannomatosis – Children’s Tumor Foundation

  https://www.ctf.org/swn/

  The diagnostic criteria in this summary were developed for healthcare providers, and it may be helpful in enhancing your understanding of the diagnostic procedures for SWN and in your discussions with clinicians about your own individual diagnosis. […] A diagnosis of SMARCB1-related schwannomatosis or LZTR1-related schwannomatosis can be made when a patient meets one of the following criteria: At least one pathologically confirmed schwannoma or hybrid nerve sheath tumor AND a SMARCB1 or LZTR1 pathogenic variant in an unaffected tissue such as blood or saliva. […] Because pain is often the main and presenting symptom, it may take several years before schwannomatosis is diagnosed and the source of the pain is identified. The degree of pain and tumors vary widely and some symptoms of schwannomatosis are shared with other conditions.

• #53 Schwannomatosis – Children’s Tumor Foundation

  https://www.ctf.org/swn/

  Genetic testing for the genes known to be involved in all types of schwannomatosis is available and should be completed whenever possible for a patient suspected of SWN. Testing is required to diagnose a specific type of schwannomatosis, except NF2-related schwannomatosis, which does not require genetic testing if clinical criteria are met.

• #54 How do doctors diagnose schwannomatosis? – Neurofibromatosis Midwest

  https://www.nfmidwest.org/blog/ufaqs/doctors-diagnose-schwannomatosis/

  The diagnosis of schwannomatosis is made on the basis of clinical findings. […] Individuals are considered to have definite schwannomatosis if they meet the following criteria: […] 1) Two or more schwannomas (with at least one that has been shown to be a schwannoma on a pathology report). […] AND […] 2) Lack of radiographic evidence of vestibular nerve tumor on an imaging study performed after age 18 years. […] Individuals are considered to have probable schwannomatosis if they meet the following criteria: […] 1) Two or more schwannomas (with at least one that has been shown to be a schwannoma on a pathology report) without symptoms of eighth nerve dysfunction at age 30 years […] OR […] 2) Two or more schwannomas (with at least one that has been shown to be a schwannoma on a pathology report) in an anatomically limited distribution without symptoms of eighth nerve dysfunction at any age. […] Some people may have a segmental form of schwannomatosis, meaning that symptoms are limited to only one part of the body. It is important to distinguish between segmental schwannomatosis and NF2, as the symptoms of both can overlap.

• #55 Schwannoma: What It Is, Causes, Symptoms & Treatment

  https://my.clevelandclinic.org/health/diseases/17877-schwannoma

  A schwannoma is a tumor that develops from Schwann cells in your peripheral nervous system or nerve roots. […] The most common type is a vestibular schwannoma, which forms in a nerve in your inner ear. […] Schwannomas are almost always benign (noncancerous) but can sometimes be malignant (cancerous). […] A common area for schwannomas is in the nerve that connects your brain to your inner ear (vestibular schwannoma). […] The most common type of schwannoma, vestibular schwannoma, is considered a brain tumor. […] Schwannomas usually develop randomly in otherwise healthy people. […] Schwannomas grow slowly and may exist for years without any symptoms. […] If you’re experiencing symptoms, your healthcare provider will likely order imaging tests. […] Imaging tests that can help diagnose a schwannoma include: Magnetic resonance imaging (MRI), Computed tomography (CT) scan, Ultrasound.

• #56 Vestibular schwannoma: evolution of diagnosis and treatment | Egyptian Journal of Neurosurgery | Full Text

  https://ejns.springeropen.com/articles/10.1186/s41984-025-00349-1

  Today, screening for VS may start with audiologic assessment (pure-tone audiogram and speech discrimination scoring) but the gold standard for diagnosis remains thin-slice gadolinium-enhanced T1-weighted MRI of internal acoustic meatus and CPA. […] After diagnosis, multiple treatment options are possible such as observational wait-and-scan, stereotactic radiosurgery, microsurgery, or combination. Each strategy has advantages and limitations. […] The advancements in stereotactic radiotherapy have provided non-invasive alternatives to surgery with good long-term tumor control though there is still lack of high-quality randomized controlled trials comparing surgical and radiotherapy options. […] Targeted molecular therapies have also provided alternative treatment options for refractory and rapidly growing tumors. Future directions in VS research may include advancements in the fields of cytogenetics, epigenetics, proteomics, and molecular biology.

• #57 Acoustic neuroma – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/acoustic-neuroma/diagnosis-treatment/drc-20356132

  A thorough physical exam, including an ear exam, is often the first step in acoustic neuroma diagnosis and treatment. […] An acoustic neuroma is often hard to diagnose in the early stages because symptoms may be easy to miss and develop slowly over time. Common symptoms such as hearing loss also are associated with many other middle and inner ear problems. […] After asking questions about your symptoms, a member of your health care team conducts an ear exam. You may need the following tests: […] Magnetic resonance imaging (MRI) with contrast dye is usually used to diagnose an acoustic neuroma. This imaging test can detect tumors as small as 1 to 2 millimeters in diameter. If MRI is not available or you can’t have an MRI scan, computerized tomography (CT) may be used. However, CT scans may miss small tumors.

• #58 Vestibular Schwannoma, Acoustic Neuroma, Common Findings for Diagnosis

  https://hearinghealthmatters.org/dizziness-depot/2023/vestibular-schwannoma-acoustic-neuroma-common-findings-for-an-uncommon-diagnosis/

  A vestibular schwannoma is a benign, slow-growing tumor, most often arising from the vestibular nerve and typically only affecting one side. A tumor in a small space, such as in the internal auditory canal, can compress the auditory and/or vestibular nerves causing unilateral auditory and vestibular symptoms. […] The diagnosis of a vestibular schwannoma/acoustic neuroma is most typically made with the combination of an MRI, conventional audiogram, vestibular testing and auditory brainstem response testing. Individuals with vestibular schwannoma typically have unilaterally abnormal test results, making tests that independently assess the right and left sides more useful than those that assess both sides in conjunction. […] This patient’s test findings were a hallmark presentation of a vestibular schwannoma in that measures of auditory function were asymmetric, reduced or absent on the affected side. As is consistent with a central vestibular compensation process, vestibular function measures that individually assessed each side were grossly abnormal, while measures that assessed overall VOR function were normal. Vestibular schwannoma is a relatively rare finding and often times the auditory and vestibular functions tests performed with these patients do not present this clearly.

• #59 Vestibular Schwannomas: Diagnosis and Surgical Treatment | IntechOpen

  https://www.intechopen.com/chapters/64569

  Over the last decades, significant advances in skull base surgery have enabled many neurosurgical centers around the world to perform surgical resection of vestibular schwannomas; otherwise, clinical observation and radiotherapy/radiosurgery can be possible management options. […] In this chapter, we expanded the general discussion of vestibular schwannomas, discussing bases for an accurate diagnose and the technical aspects for the surgical approaches, drilling of internal auditory canal, and its reconstruction as well as the technical nuances when handling very small and large/residual tumors. […] Dizziness, vertigo, and progressive hearing loss (earliest symptom) are the most frequent complaints. […] Dizziness is a frequent complaint in daily ENT practice, and patients complaining of unilateral hearing loss associated or not to vestibular symptoms are frequently seen by ENT surgeons.

• #60 Vestibular schwannoma: evolution of diagnosis and treatment | Egyptian Journal of Neurosurgery | Full Text

  https://ejns.springeropen.com/articles/10.1186/s41984-025-00349-1

  Today, screening for VS may start with audiologic assessment (pure-tone audiogram and speech discrimination scoring) but the gold standard for diagnosis remains thin-slice gadolinium-enhanced T1-weighted MRI of internal acoustic meatus and CPA. […] After diagnosis, multiple treatment options are possible such as observational wait-and-scan, stereotactic radiosurgery, microsurgery, or combination. Each strategy has advantages and limitations. […] The advancements in stereotactic radiotherapy have provided non-invasive alternatives to surgery with good long-term tumor control though there is still lack of high-quality randomized controlled trials comparing surgical and radiotherapy options. […] Targeted molecular therapies have also provided alternative treatment options for refractory and rapidly growing tumors. Future directions in VS research may include advancements in the fields of cytogenetics, epigenetics, proteomics, and molecular biology.

• #61 Spinal schwannoma | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/spinal-schwannoma?lang=us

  Spinal schwannomas are benign nerve sheath tumors within the spinal canal, typically arising from spinal nerve roots and it is the most common nerve sheath tumor of spine. They are one of the two most common intradural extramedullary spinal tumors, representing 15-50% of such lesions. […] As spinal schwannomas usually arise from the dorsal sensory roots, patients commonly present with pain. Radicular sensory changes also occur. Weakness is less common. Myelopathy may occur if the lesion is large. […] Schwannomas are slow growing lesions but can nevertheless be debilitating. They almost never undergo malignant change. Surgery is the treatment of choice. Gross total resection is usually curative for patients with sporadic tumors. For patients with NF2, there is a high incidence of new tumor formation.

• #62 Spinal Schwannoma Diagnosis & Treatment – NYC | Columbia Neurosurgery in New York City

  https://www.neurosurgery.columbia.edu/patient-care/conditions/spinal-schwannoma

  Schwannomas are nerve sheath tumors, or tumors that originate from the layer of insulation that surrounds nerve fibers. At the Spine Hospital at the Neurological Institute of New York, we specialize in treating spinal schwannomas. […] Imaging studies usually provide the diagnosis of spinal schwannomas. Magnetic resonance (MR) scans, for example, use magnets, radio waves, and computer technology to produce images of organs and tissues like the brain and spinal cord. MR scans can identify spinal schwannomas as small as a few millimeters. […] MR scans are sometimes performed using a contrast-enhancing agent—a material like a dye that makes some tumors light up brightly. The contrast-enhancing agent is delivered intravenously (through an IV) before the MR scan is performed. Most schwannomas enhance with contrast administration. Other intradural tumors, such as meningiomas and myxopapillary ependymomas, may have a similar appearance to schwannoma on MR imaging.

• #63 NYC Spinal Schwannomas Treatments & Diagnosis | Och Spine at NewYork-Presbyterian at the Weill Cornell Medicine Center for Comprehensive Spine Care

  https://comprehensivespine.weillcornell.org/conditions-we-treat/spinal-schwannomas/diagnosing-and-treating-spinal-schwannomas/

  A doctor will begin with a thorough history of the patient and physical exam. If a doctor believes a spinal tumor may be present, the following tests may be ordered: […] An x-ray can show which area of the spine has been affected. […] Computerized tomography (CT) is a noninvasive procedure that uses x-rays to produce a three-dimensional image of the spine. A CT shows more detail than an X-ray, and can identify the bones in greater detail, and show the nerves, spinal cord, and any possible damage to them. […] An MRI uses magnetic fields and radio-frequency waves to create an image of the spine and can reveal fine details of the spine, including tumors, nerves, and other details. An MRI scan can show details in the spine that cant normally be seen on an x-ray. […] Removal of the schwannoma via surgery may be the best option to not only remove the growth but also relieve pressure on the spine and nerves that it is causing.

• #64 Schwannoma – Overview – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/schwannoma/cdc-20352974

  Electromyogram (EMG). For this test, your doctor places small needles in your muscles so an electromyography instrument can record the electrical activity in your muscle as you try to move it. […] Nerve conduction study. You’re likely to have this test along with your EMG. It measures how quickly your nerves carry electrical signals to your muscles. […] Tumor biopsy. If imaging tests identify a nerve tumor, your doctor may remove and analyze a small sample of cells (biopsy) from your tumor. Depending on the tumor’s size and location, you may need local or general anesthesia during the biopsy. […] Nerve biopsy. If you have a condition such as progressive peripheral neuropathy or enlarged nerves that mimic nerve tumors, your doctor may take a nerve biopsy.

• #65 Spinal schwannoma | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/spinal-schwannoma?lang=us

  Spinal schwannomas are benign nerve sheath tumors within the spinal canal, typically arising from spinal nerve roots and it is the most common nerve sheath tumor of spine. They are one of the two most common intradural extramedullary spinal tumors, representing 15-50% of such lesions. […] As spinal schwannomas usually arise from the dorsal sensory roots, patients commonly present with pain. Radicular sensory changes also occur. Weakness is less common. Myelopathy may occur if the lesion is large. […] Schwannomas are slow growing lesions but can nevertheless be debilitating. They almost never undergo malignant change. Surgery is the treatment of choice. Gross total resection is usually curative for patients with sporadic tumors. For patients with NF2, there is a high incidence of new tumor formation.

• #66 Diagnostic and Therapeutic Strategy for Vagal Schwannoma: Case Series and Literature Review

  https://www.mdpi.com/1648-9144/59/6/1013

  A schwannoma is an uncommon and benign encapsulated nerve sheath tumor with a slow growing attitude that originates from Schwann cells. […] Pre-operative investigations include ultrasonography (US), computed tomography (CT), magnetic resonance imaging (MRI) and fine-needle cytology (FNAC). […] Even though complete surgical resection is the mainstay of treatment, clinical management of vagal schwannomas is a real diagnostic and therapeutic challenge because not only are the medical history and clinical examination often non-specific, but also vagal nerve injury following surgical resection still represents an unsolved problem. […] The aim of this paper is to provide a case series along with a diagnostic and therapeutic algorithm for vagal schwannomas of the head and neck, combining our experience with clinical evidence available in the literature.

• #67 Diagnostic and Therapeutic Strategy for Vagal Schwannoma: Case Series and Literature Review

  https://www.mdpi.com/1648-9144/59/6/1013

  The preoperative diagnostic workup included ultrasound (US) in nine cases, computed tomography (CT) with contrast in six patients and magnetic resonance imaging (MRI) of the neck in seven cases. […] A summary of the clinical features of the patients included in this study is shown in Table 1. […] The pathological examination of these cases confirmed the diagnosis of a benign schwannoma of the vagus nerve. […] The most common symptom of a vagal schwannoma is hoarseness, due to vocal cord palsy. […] In treatment planning for a schwannoma, it is fundamental to determine the origin of the tumor to preserve the nerve function. […] A preoperative approach with imaging modalities is essential for a correct diagnosis, providing data about the location, size and extent of the tumor that represent basic aspects to define the surgical operation.

• #68 Diagnostic and Therapeutic Strategy for Vagal Schwannoma: Case Series and Literature Review

  https://www.mdpi.com/1648-9144/59/6/1013

  The preoperative diagnostic workup included ultrasound (US) in nine cases, computed tomography (CT) with contrast in six patients and magnetic resonance imaging (MRI) of the neck in seven cases. […] A summary of the clinical features of the patients included in this study is shown in Table 1. […] The pathological examination of these cases confirmed the diagnosis of a benign schwannoma of the vagus nerve. […] The most common symptom of a vagal schwannoma is hoarseness, due to vocal cord palsy. […] In treatment planning for a schwannoma, it is fundamental to determine the origin of the tumor to preserve the nerve function. […] A preoperative approach with imaging modalities is essential for a correct diagnosis, providing data about the location, size and extent of the tumor that represent basic aspects to define the surgical operation.

• #69 Diagnostic and Therapeutic Strategy for Vagal Schwannoma: Case Series and Literature Review

  https://www.mdpi.com/1648-9144/59/6/1013

  The preoperative diagnostic workup included ultrasound (US) in nine cases, computed tomography (CT) with contrast in six patients and magnetic resonance imaging (MRI) of the neck in seven cases. […] A summary of the clinical features of the patients included in this study is shown in Table 1. […] The pathological examination of these cases confirmed the diagnosis of a benign schwannoma of the vagus nerve. […] The most common symptom of a vagal schwannoma is hoarseness, due to vocal cord palsy. […] In treatment planning for a schwannoma, it is fundamental to determine the origin of the tumor to preserve the nerve function. […] A preoperative approach with imaging modalities is essential for a correct diagnosis, providing data about the location, size and extent of the tumor that represent basic aspects to define the surgical operation.

• #70 Diagnostic and Therapeutic Strategy for Vagal Schwannoma: Case Series and Literature Review

  https://www.mdpi.com/1648-9144/59/6/1013

  The preoperative diagnostic workup included ultrasound (US) in nine cases, computed tomography (CT) with contrast in six patients and magnetic resonance imaging (MRI) of the neck in seven cases. […] A summary of the clinical features of the patients included in this study is shown in Table 1. […] The pathological examination of these cases confirmed the diagnosis of a benign schwannoma of the vagus nerve. […] The most common symptom of a vagal schwannoma is hoarseness, due to vocal cord palsy. […] In treatment planning for a schwannoma, it is fundamental to determine the origin of the tumor to preserve the nerve function. […] A preoperative approach with imaging modalities is essential for a correct diagnosis, providing data about the location, size and extent of the tumor that represent basic aspects to define the surgical operation.

• #71 Intracochlear Schwannoma: Diagnosis and Management

  https://www.arquivosdeorl.org.br/additional/acervo_eng.asp?id=1899

  Schwannomas of the eighth cranial nerve are benign tumors that usually occur in the internal auditory canal or the cerebellopontine angle cistern. Rarely, these tumors may originate from the neural elements within the vestibule, cochlea, or semicircular canals and are called intralabyrinthine schwannomas. Intracochlear schwannomas (ICSs) represent a small percentage of these tumors, and their diagnosis is based on high-resolution magnetic resonance imaging (MRI). […] MRI showed a small intracochlear nodular lesion in the modiolus, isointense on T1 with a high contrast enhancement on T1 postgadolinium images. […] Once diagnosed, not all ICS patients require surgery. Treatment options for ICS include stereotactic radiotherapy and rescanning policy, depending on the tumor’s size, evidence of the tumor’s growth, degree of hearing loss, intractable vestibular symptoms, concern about the pathologic diagnosis, and the patient’s other medical conditions.

• #72 Schwannomas can also occur in the lungs | CMAR

  https://www.dovepress.com/challenging-diagnosis-unmasking-the-enigma-of-imaging-findings-with-lu-peer-reviewed-fulltext-article-CMAR

  Schwannomas are benign slow-growing tumors arising from the embryonic neural crest cells of the nerve sheaths of peripheral and cranial nerves, and they are a rare type of soft tissue mass that is usually always solitary. […] Schwannomas of the lung are extremely rare. Fewer than ten cases of schwannomas in this organ region have been reported in the existing literature. […] This space occupying lesion was eventually confirmed as a schwannoma by needle biopsy tissues. […] The data presented in this case report can help clinicians to obtain information on the identification of this disease, which highlighted lung schwannoma as a differential diagnosis for patients with intermittent pain. […] Lung schwannomas have been previously diagnosed as metastases based on CT images. […] Diagnoses of schwannomas using magnetic resonance imaging (MRI), CT or ultrasound are challenging.

• #73 Intracochlear Schwannoma: Diagnosis and Management

  https://www.arquivosdeorl.org.br/additional/acervo_eng.asp?id=1899

  Schwannomas of the eighth cranial nerve are benign tumors that usually occur in the internal auditory canal or the cerebellopontine angle cistern. Rarely, these tumors may originate from the neural elements within the vestibule, cochlea, or semicircular canals and are called intralabyrinthine schwannomas. Intracochlear schwannomas (ICSs) represent a small percentage of these tumors, and their diagnosis is based on high-resolution magnetic resonance imaging (MRI). […] MRI showed a small intracochlear nodular lesion in the modiolus, isointense on T1 with a high contrast enhancement on T1 postgadolinium images. […] Once diagnosed, not all ICS patients require surgery. Treatment options for ICS include stereotactic radiotherapy and rescanning policy, depending on the tumor’s size, evidence of the tumor’s growth, degree of hearing loss, intractable vestibular symptoms, concern about the pathologic diagnosis, and the patient’s other medical conditions.

• #74 Current status of the diagnosis and treatment of gastrointestinal schwannoma (Review)

  https://www.spandidos-publications.com/10.3892/ol.2021.12645

  Gastrointestinal schwannoma is a rare, slow-growing and benign tumor that mostly originates in the Auerbach myenteric nerve plexus in the gastrointestinal tract. […] Endoscopy, ultrasound and imaging examinations serve an important auxiliary role in the clinical identification, diagnosis and differential diagnosis of lesions; assessment of risk; and preparation for surgery. […] S100 positivity is a hallmark of schwannoma. […] Surgical removal of the tumor is the main treatment for schwannoma. […] Benign gastrointestinal schwannoma has a good prognosis without recurrence and metastasis; malignant transformation is extremely rare and has a poor prognosis. […] The diagnostic accuracy is diminished by the morphological diversity of GIS, and it is difficult to develop a unified diagnostic standard.

• #75 Schwannomas can also occur in the lungs | CMAR

  https://www.dovepress.com/challenging-diagnosis-unmasking-the-enigma-of-imaging-findings-with-lu-peer-reviewed-fulltext-article-CMAR

  Schwannomas are benign slow-growing tumors arising from the embryonic neural crest cells of the nerve sheaths of peripheral and cranial nerves, and they are a rare type of soft tissue mass that is usually always solitary. […] Schwannomas of the lung are extremely rare. Fewer than ten cases of schwannomas in this organ region have been reported in the existing literature. […] This space occupying lesion was eventually confirmed as a schwannoma by needle biopsy tissues. […] The data presented in this case report can help clinicians to obtain information on the identification of this disease, which highlighted lung schwannoma as a differential diagnosis for patients with intermittent pain. […] Lung schwannomas have been previously diagnosed as metastases based on CT images. […] Diagnoses of schwannomas using magnetic resonance imaging (MRI), CT or ultrasound are challenging.

• #76 Schwannomas can also occur in the lungs | CMAR

  https://www.dovepress.com/challenging-diagnosis-unmasking-the-enigma-of-imaging-findings-with-lu-peer-reviewed-fulltext-article-CMAR

  When lung schwannoma is suspected, histopathological examination should be considered because imaging alone makes diagnosis difficult. […] Tissue histopathology is used to determine the diagnosis of lung schwannoma, whereas radiological evaluation just confirms the diagnosis. […] In conclusion, this novel case highlights lung schwannoma as a differential diagnosis for patients with intermittent pain. The diagnostic lessons of chest CT reading to distinguish lung schwannomas from their similar diseases are also highlighted.

• #77 Schwannoma: What It Is, Causes, Symptoms & Treatment

  https://my.clevelandclinic.org/health/diseases/17877-schwannoma

  Your healthcare provider may also perform a biopsy to check if the tumor is schwannoma. […] Treatment for schwannoma depends on where the tumor is in your body and how quickly it’s growing. […] Some treatment options include: Observation/watch and wait, Surgery, Radiation therapy. […] Malignant (cancerous) schwannomas may be treated with immunotherapy and chemotherapy medications as well. […] Unfortunately, schwannomas can’t be prevented. […] The prognosis (the estimate of how a disease will affect you long-term) for schwannoma depends on a few factors, including: Where the tumor is in your body, How big the tumor is, How much of the tumor was taken out during surgery (if applicable), If the tumor is benign or cancerous. […] In general, the prognosis for schwannoma is usually good. […] If you’ve been diagnosed with schwannoma and develop new or worse symptoms, see your healthcare provider for guidance on how to manage your schwannoma.

• #78 EANO guideline on the diagnosis and treatment of vestibular schwannoma

  https://pmc.ncbi.nlm.nih.gov/articles/PMC6954440/

  The task of observational management is to monitor tumor growth and hearing function to obtain data for a potential decision for therapy. […] The choice of surgical approach depends on hearing status, tumor characteristics, patients preferences, and surgeons expertise. […] The goal of surgery should be total or near-total resection, since residual tumor volume correlates with rate of recurrence. […] The maximum dose at the modiolus of the cochlea has been reported to be a negative predictor for functional hearing preservation with a threshold around 4 Gy. […] There are no randomized, prospective studies comparing SRS and SRT. […] The recommendation is to use SRS with a dose of 11-14 Gy at the margin and 11-12 Gy when the risk of hearing loss is a critical issue. […] The high incidence of newly developing tumors, the fast tumor growth and early tumor regrowth, as well as the lack of a cure make patient management challenging.

• #79 Guidelines on the Management of Patients with Vestibular Schwannoma

  https://www.cns.org/guidelines/management-patients-vestibular-schwannoma/5-role-of-imaging-in-diagnosis-management-of-patie

  Level 3: For patients receiving gross total resection, a postoperative MRI may be considered to document the surgical impression and may occur as late as 1 year after surgery. For patients not receiving gross total resection, more frequent surveillance scans are suggested; annual MRI scans may be reasonable for 5 years. Imaging follow-up should be adjusted accordingly for continued surveillance if any change in nodular enhancement is demonstrated.

• #80 How to diagnose and treat a vestibular schwannoma | Medmastery

  https://www.medmastery.com/guides/neurology-diseases-clinical-guide/how-diagnose-and-treat-vestibular-schwannoma?srsltid=AfmBOopm64nsyZbo3VjZoO3ovdl51m2N481x-4ThdIjJkP37CIgdB-Hd

  On examination, cognition and speech should be normal unless there is associated hydrocephalus. […] Magnetic resonance imaging (MRI) usually demonstrates a brightly enhancing mass on the eighth cranial nerve near the brainstem or in the internal auditory canal. […] If the tumor is less than 15 mm in diameter, and the patients hearing is intact, monitor the tumor with yearly audiology evaluations. […] If the tumor is less than 15 mm and hearing is impaired (but serviceable), consider conservative management (e.g., following the tumor), surgical resection, or stereotactic radiation. […] In tumors 15 to 25 mm in diameter, surgical resection should be considered in healthy candidates (particularly younger ones), no matter the status of their hearing. […] Generally speaking, tumors over 25 mm in diameter should be addressed surgically. […] The residual tumor is then followed with MRI every 6 to 12 months and is only addressed if there is evidence of a recurrence.

• #81 New Facial Nerve Schwannoma diagnosis

  https://www.anausa.org/smf/index.php?topic=23364.0

  Just wanted to say hello to everyone here. I was diagnosed on 1/12/2017 with a 6mm enhancing tumor on MRI with contrast. […] Both surgeons so far have advised to watch and wait so here I am. […] His official diagnosis is a Facial Nerve Schwannoma even though I am not typically symptomatic at this time. That is strictly based on the MRI results I received closer to home that revealed the tumor in the first place. […] He reiterated that it is very small. […] I appreciated the fact that he counseled against any intervention at this time. […] Each of the last two surgeon’s have gone to good length allaying my fear of that scenario. […] None of the doctors I have seen have recommended a surgical treatment. Matter of fact, each one discouraged surgical treatment. […] The risk of long term effects of radiation were much smaller than the risks of surgical intervention. […] Wait and watch is a good strategy.

• #82 Diagnostic and Therapeutic Strategy for Vagal Schwannoma: Case Series and Literature Review

  https://www.mdpi.com/1648-9144/59/6/1013

  The surgical approach is the treatment of choice, but the slow growth and the non-invasive nature of this lesion justify the observational approach as well. […] Common postoperative complications following the removal of a vagal nerve schwannoma are due to the origin of the tumor directly from the nerve fibers. […] In our case series, we report two cases of Horner’s syndrome as post-surgical sequelae. […] Those patients unsuitable for surgery may benefit from an observational approach (“wait and see”) or, if symptomatic, from radiotherapy, although there is not enough strong evidence in the literature for that approach. […] The clinical management of vagal schwannomas is definitively challenging both in terms of diagnosis and treatment choice.

• #83 Schwannoma | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/schwannoma?lang=us

  Schwannomas, less commonly called neurinomas or neurilemmomas, are benign tumors of Schwann cell origin and are the most common tumor of peripheral nerves, including cranial nerves. […] Presentation depends on the location of the tumor but generally, symptoms are due to local mass effect or dysfunction of the nerve they arise from. […] CT is not as sensitive or specific for the diagnosis of schwannoma as MRI but is often the first investigation obtained. […] Schwannomas have fairly predictable signal characteristics: T1 isointense or hypointense, T1 C+ (Gd) intense enhancement, T2 heterogeneously hyperintense. […] Surgery is the treatment of choice. As schwannomas do not infiltrate the parent nerve, they can usually be separated from it. Recurrence is unusual after complete resection. They rarely undergo malignant change.

• #84 EANO guideline on the diagnosis and treatment of vestibular schwannoma

  https://pmc.ncbi.nlm.nih.gov/articles/PMC6954440/

  The task of observational management is to monitor tumor growth and hearing function to obtain data for a potential decision for therapy. […] The choice of surgical approach depends on hearing status, tumor characteristics, patients preferences, and surgeons expertise. […] The goal of surgery should be total or near-total resection, since residual tumor volume correlates with rate of recurrence. […] The maximum dose at the modiolus of the cochlea has been reported to be a negative predictor for functional hearing preservation with a threshold around 4 Gy. […] There are no randomized, prospective studies comparing SRS and SRT. […] The recommendation is to use SRS with a dose of 11-14 Gy at the margin and 11-12 Gy when the risk of hearing loss is a critical issue. […] The high incidence of newly developing tumors, the fast tumor growth and early tumor regrowth, as well as the lack of a cure make patient management challenging.

• #85 How to diagnose and treat a vestibular schwannoma | Medmastery

  https://www.medmastery.com/guides/neurology-diseases-clinical-guide/how-diagnose-and-treat-vestibular-schwannoma?srsltid=AfmBOopm64nsyZbo3VjZoO3ovdl51m2N481x-4ThdIjJkP37CIgdB-Hd

  With further refinement, morbidity was significantly reduced, but the preservation of facial movement and hearing remained a challenge. […] Since the early 2000s, facial movement preservation rates with surgery have gone up significantly, and there has been moderate success in hearing preservation (particularly with small tumors). […] Stereotactic radiation treatment has been found to control smaller tumors while allowing for high rates of preservation of facial function and hearing. […] Some authors advocate for the use of stereotactic radiation over surgery for small- to medium-sized tumors. […] Patients with a vestibular schwannoma often present with hearing loss and tinnitus in the affected ear, and occasionally disequilibrium. […] Audiologists who pick up this hearing loss on testing will usually refer patients to neuro-otologists specialized in operating on disorders affecting the temporal bone and hearing apparatuses.

• #86 Schwannoma (grade 1) | UCSF Brain Tumor Center

  https://braintumorcenter.ucsf.edu/condition/schwannoma-grade-1

  Schwannomas of sufficient size (and/or those causing sufficient symptoms) will be treated with surgery to remove as much of the tumor as possible. […] For vestibular schwannomas, this surgery is often performed by a neurosurgeon working alongside an otolaryngologist specializing in neuro-otology because the approaches (which typically are performed from the side or back of the head) require removing bone and working around structures that are close to cranial nerves and structures involved in hearing. […] Occasionally, depending on the size, number, and location of the tumor(s), radiation therapy (including radiosurgery) may be suggested as an adjunct or alternative to surgery. […] For patients with schwannomas that are part of NF-2, there are promising medical therapies that can help.

• #87 How to diagnose and treat a vestibular schwannoma | Medmastery

  https://www.medmastery.com/guides/neurology-diseases-clinical-guide/how-diagnose-and-treat-vestibular-schwannoma?srsltid=AfmBOopm64nsyZbo3VjZoO3ovdl51m2N481x-4ThdIjJkP37CIgdB-Hd

  With further refinement, morbidity was significantly reduced, but the preservation of facial movement and hearing remained a challenge. […] Since the early 2000s, facial movement preservation rates with surgery have gone up significantly, and there has been moderate success in hearing preservation (particularly with small tumors). […] Stereotactic radiation treatment has been found to control smaller tumors while allowing for high rates of preservation of facial function and hearing. […] Some authors advocate for the use of stereotactic radiation over surgery for small- to medium-sized tumors. […] Patients with a vestibular schwannoma often present with hearing loss and tinnitus in the affected ear, and occasionally disequilibrium. […] Audiologists who pick up this hearing loss on testing will usually refer patients to neuro-otologists specialized in operating on disorders affecting the temporal bone and hearing apparatuses.

• #88 Acoustic neuroma – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/acoustic-neuroma/diagnosis-treatment/drc-20356132

  Stereotactic radiosurgery technology uses many small gamma rays to deliver a precise dose of radiation to the target. […] A type of radiation therapy known as stereotactic radiosurgery can treat an acoustic neuroma. It’s often used if the tumor is small less than 2.5 centimeters in diameter. Radiation therapy also may be used if you are an older adult or you cannot tolerate surgery for health reasons. […] The goal of stereotactic radiosurgery is to stop the growth of a tumor, preserve the facial nerve’s function and possibly preserve hearing. […] Your health care team monitors your progress with follow-up imaging studies and hearing tests.

• #89 EANO guideline on the diagnosis and treatment of vestibular schwannoma

  https://pmc.ncbi.nlm.nih.gov/articles/PMC6954440/

  The task of observational management is to monitor tumor growth and hearing function to obtain data for a potential decision for therapy. […] The choice of surgical approach depends on hearing status, tumor characteristics, patients preferences, and surgeons expertise. […] The goal of surgery should be total or near-total resection, since residual tumor volume correlates with rate of recurrence. […] The maximum dose at the modiolus of the cochlea has been reported to be a negative predictor for functional hearing preservation with a threshold around 4 Gy. […] There are no randomized, prospective studies comparing SRS and SRT. […] The recommendation is to use SRS with a dose of 11-14 Gy at the margin and 11-12 Gy when the risk of hearing loss is a critical issue. […] The high incidence of newly developing tumors, the fast tumor growth and early tumor regrowth, as well as the lack of a cure make patient management challenging.

• #90 EANO guideline on the diagnosis and treatment of vestibular schwannoma

  https://pmc.ncbi.nlm.nih.gov/articles/PMC6954440/

  The task of observational management is to monitor tumor growth and hearing function to obtain data for a potential decision for therapy. […] The choice of surgical approach depends on hearing status, tumor characteristics, patients preferences, and surgeons expertise. […] The goal of surgery should be total or near-total resection, since residual tumor volume correlates with rate of recurrence. […] The maximum dose at the modiolus of the cochlea has been reported to be a negative predictor for functional hearing preservation with a threshold around 4 Gy. […] There are no randomized, prospective studies comparing SRS and SRT. […] The recommendation is to use SRS with a dose of 11-14 Gy at the margin and 11-12 Gy when the risk of hearing loss is a critical issue. […] The high incidence of newly developing tumors, the fast tumor growth and early tumor regrowth, as well as the lack of a cure make patient management challenging.

• #91 Acoustic neuroma – Diagnosis and treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/acoustic-neuroma/diagnosis-treatment/drc-20356132

  Stereotactic radiosurgery technology uses many small gamma rays to deliver a precise dose of radiation to the target. […] A type of radiation therapy known as stereotactic radiosurgery can treat an acoustic neuroma. It’s often used if the tumor is small less than 2.5 centimeters in diameter. Radiation therapy also may be used if you are an older adult or you cannot tolerate surgery for health reasons. […] The goal of stereotactic radiosurgery is to stop the growth of a tumor, preserve the facial nerve’s function and possibly preserve hearing. […] Your health care team monitors your progress with follow-up imaging studies and hearing tests.

• #92 How to diagnose and treat a vestibular schwannoma | Medmastery

  https://www.medmastery.com/guides/neurology-diseases-clinical-guide/how-diagnose-and-treat-vestibular-schwannoma?srsltid=AfmBOopm64nsyZbo3VjZoO3ovdl51m2N481x-4ThdIjJkP37CIgdB-Hd

  With further refinement, morbidity was significantly reduced, but the preservation of facial movement and hearing remained a challenge. […] Since the early 2000s, facial movement preservation rates with surgery have gone up significantly, and there has been moderate success in hearing preservation (particularly with small tumors). […] Stereotactic radiation treatment has been found to control smaller tumors while allowing for high rates of preservation of facial function and hearing. […] Some authors advocate for the use of stereotactic radiation over surgery for small- to medium-sized tumors. […] Patients with a vestibular schwannoma often present with hearing loss and tinnitus in the affected ear, and occasionally disequilibrium. […] Audiologists who pick up this hearing loss on testing will usually refer patients to neuro-otologists specialized in operating on disorders affecting the temporal bone and hearing apparatuses.

• #93 How to diagnose and treat a vestibular schwannoma | Medmastery

  https://www.medmastery.com/guides/neurology-diseases-clinical-guide/how-diagnose-and-treat-vestibular-schwannoma?srsltid=AfmBOopm64nsyZbo3VjZoO3ovdl51m2N481x-4ThdIjJkP37CIgdB-Hd

  On examination, cognition and speech should be normal unless there is associated hydrocephalus. […] Magnetic resonance imaging (MRI) usually demonstrates a brightly enhancing mass on the eighth cranial nerve near the brainstem or in the internal auditory canal. […] If the tumor is less than 15 mm in diameter, and the patients hearing is intact, monitor the tumor with yearly audiology evaluations. […] If the tumor is less than 15 mm and hearing is impaired (but serviceable), consider conservative management (e.g., following the tumor), surgical resection, or stereotactic radiation. […] In tumors 15 to 25 mm in diameter, surgical resection should be considered in healthy candidates (particularly younger ones), no matter the status of their hearing. […] Generally speaking, tumors over 25 mm in diameter should be addressed surgically. […] The residual tumor is then followed with MRI every 6 to 12 months and is only addressed if there is evidence of a recurrence.

• #94 Schwannoma (grade 1) | UCSF Brain Tumor Center

  https://braintumorcenter.ucsf.edu/condition/schwannoma-grade-1

  Schwannomas of sufficient size (and/or those causing sufficient symptoms) will be treated with surgery to remove as much of the tumor as possible. […] For vestibular schwannomas, this surgery is often performed by a neurosurgeon working alongside an otolaryngologist specializing in neuro-otology because the approaches (which typically are performed from the side or back of the head) require removing bone and working around structures that are close to cranial nerves and structures involved in hearing. […] Occasionally, depending on the size, number, and location of the tumor(s), radiation therapy (including radiosurgery) may be suggested as an adjunct or alternative to surgery. […] For patients with schwannomas that are part of NF-2, there are promising medical therapies that can help.

• #95 Diagnosis & Treatment – Neurofibromatosis Program

  https://www.uab.edu/medicine/nfprogram/learn-about-nf/schwannomatosis/diagnosis-treatment

  Because there is currently no cure for schwannomatosis, treatment and medical management of the condition often focuses on surgery to remove schwannomas (nerve tumors) and lessen the associated nerve pain. Complete removal of the tumors often helps pain to subside, although the pain may recur if other tumors form. For management of chronic pain that is often associated with schwannomatosis, treatment administered in a multidisciplinary pain clinic is often recommended.

• #96 Vestibular schwannoma: evolution of diagnosis and treatment | Egyptian Journal of Neurosurgery | Full Text

  https://ejns.springeropen.com/articles/10.1186/s41984-025-00349-1

  Today, screening for VS may start with audiologic assessment (pure-tone audiogram and speech discrimination scoring) but the gold standard for diagnosis remains thin-slice gadolinium-enhanced T1-weighted MRI of internal acoustic meatus and CPA. […] After diagnosis, multiple treatment options are possible such as observational wait-and-scan, stereotactic radiosurgery, microsurgery, or combination. Each strategy has advantages and limitations. […] The advancements in stereotactic radiotherapy have provided non-invasive alternatives to surgery with good long-term tumor control though there is still lack of high-quality randomized controlled trials comparing surgical and radiotherapy options. […] Targeted molecular therapies have also provided alternative treatment options for refractory and rapidly growing tumors. Future directions in VS research may include advancements in the fields of cytogenetics, epigenetics, proteomics, and molecular biology.

• #97 Diagnosis and Management of Schwannomas Originating from the Cervical Vagus Nerve

  https://pmc.ncbi.nlm.nih.gov/articles/PMC4473416/

  A schwannoma is a benign, slow growing, encapsulated nerve sheath tumour. Presentation of a schwannoma is a diagnostic and management challenge. […] Preoperative diagnoses of schwannomas in the lateral part of the neck can cause confusion with its nerve of origin (ie whether it arises from the vagus nerve or a sympathetic chain). Computed tomography and magnetic resonance imaging reveal valuable information regarding the location and origin of the tumour as well as aiding surgical planning. The diagnosis can be confirmed intraoperatively. Histopathological studies searching for classical features and immunohistochemical staining for S100 also confirm the diagnosis. […] Schwannomas should be considered in the differential diagnoses of unusual masses in the neck. Preoperative imaging elicits valuable information regarding the location and origin of schwannomas and histopathology confirms the diagnosis.

• #98 Vestibular schwannoma: evolution of diagnosis and treatment | Egyptian Journal of Neurosurgery | Full Text

  https://ejns.springeropen.com/articles/10.1186/s41984-025-00349-1

  Today, screening for VS may start with audiologic assessment (pure-tone audiogram and speech discrimination scoring) but the gold standard for diagnosis remains thin-slice gadolinium-enhanced T1-weighted MRI of internal acoustic meatus and CPA. […] After diagnosis, multiple treatment options are possible such as observational wait-and-scan, stereotactic radiosurgery, microsurgery, or combination. Each strategy has advantages and limitations. […] The advancements in stereotactic radiotherapy have provided non-invasive alternatives to surgery with good long-term tumor control though there is still lack of high-quality randomized controlled trials comparing surgical and radiotherapy options. […] Targeted molecular therapies have also provided alternative treatment options for refractory and rapidly growing tumors. Future directions in VS research may include advancements in the fields of cytogenetics, epigenetics, proteomics, and molecular biology.

• #99 Diagnosis and Management of Schwannomas Originating from the Cervical Vagus Nerve

  https://pmc.ncbi.nlm.nih.gov/articles/PMC4473416/

  MRI characteristics of schwannomas include specific signs (split fat, fascicular, target) and signal patterns (ie isointense T1 signal relative to skeletal muscle; increased and slightly heterogeneous T2 signals). […] As reported by Furukawa et al, MRI findings are also useful for preoperative estimation of the nerve of origin of schwannomas of the vagus nerve and schwannomas of the cervical sympathetic chain. […] Preoperative diagnoses based on imaging studies offer better understanding of the anatomical correlations between the nerve and vascular structures than intraoperative diagnoses. […] Schwannomas of the vagus nerve can be confused with metastatic lymph nodes, paragangliomas and schwannomas of the cervical sympathetic chain. […] Neither the diagnosis nor the treatment of schwannomas of the cervical vagus nerve are straightforward. Only appropriate imaging and preoperative planning ensure successful treatment of schwannomas.

• #100 Vestibular schwannoma: evolution of diagnosis and treatment | Egyptian Journal of Neurosurgery | Full Text

  https://ejns.springeropen.com/articles/10.1186/s41984-025-00349-1

  Today, screening for VS may start with audiologic assessment (pure-tone audiogram and speech discrimination scoring) but the gold standard for diagnosis remains thin-slice gadolinium-enhanced T1-weighted MRI of internal acoustic meatus and CPA. […] After diagnosis, multiple treatment options are possible such as observational wait-and-scan, stereotactic radiosurgery, microsurgery, or combination. Each strategy has advantages and limitations. […] The advancements in stereotactic radiotherapy have provided non-invasive alternatives to surgery with good long-term tumor control though there is still lack of high-quality randomized controlled trials comparing surgical and radiotherapy options. […] Targeted molecular therapies have also provided alternative treatment options for refractory and rapidly growing tumors. Future directions in VS research may include advancements in the fields of cytogenetics, epigenetics, proteomics, and molecular biology.

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