Retrocochlear Diseases
Evoked Potentials, Auditory, Brain Stem
Mass screening for retrocochlear disorders: low-field-strength (0.2-T) versus high-field-strength (1.5-T) MR imaging. (1/1)
BACKGROUND AND PURPOSE: In patients with clinical symptoms suggestive of a retrocochlear disorder, contrast-enhanced T1-weighted spin-echo (SE) high-field-strength MR imaging is considered the criterion standard in assessing vestibular schwannoma. However, only 10-20% of its findings are pathologic. Our purpose was to prospectively compare the performance of low-field-strength MR imaging in screening for retrocochlear disorders, with high-field-strength MR imaging as the criterion standard. METHODS: A total of 287 patients with suspected retrocochlear disease underwent axial 1.5-T MR imaging with a T1-weighted SE sequence before and after contrast enhancement and with a high-resolution T2-weighted construction interference in steady state sequence. At immediate follow-up, the same patients underwent axial 0.2-T T1-weighted SE imaging without additional contrast enhancement. Results were classified as negative, positive, or uncertain and were analyzed in light of the patients' clinical symptoms. RESULTS: MR imaging at 1.5 T depicted 63 disorders (21.95%), including 53 schwannomas, three other tumors, and seven other disorders (ie, gadolinium-enhancing inner ear, facial nerve, or meninges). MR imaging at 0.2 T showed evidence of 58 disorders; five disorders were not detected, although all schwannomas and other tumors were seen, including those smaller than 2 mm, and only two (28.6%) of the other disorders were detected. When correlated with clinical data, results showed that the five undetected disorders occurred in patients with unusual clinical signs. CONCLUSION: MR imaging at 0.2 T provided high sensitivity in detecting vestibular schwannoma of the internal auditory canal or cerebellopontine angle; it can be used for mass screening for this disease. Positive and uncertain imaging findings should be followed up with high-field-strength MR imaging. (+info)Retrocochlear diseases refer to conditions that affect the structures beyond the cochlea in the auditory pathway, which is responsible for hearing. These structures include the vestibulocochlear nerve (cranial nerve VIII), brainstem, and cerebellum. Examples of retrocochlear diseases are acoustic neuroma (vestibular schwannoma), meningioma, and auditory nerve tumors. Symptoms may include unilateral hearing loss, tinnitus, vertigo, and balance difficulties. Early diagnosis and management of these conditions are crucial to prevent further damage and preserve hearing function.
Auditory brainstem evoked potentials (ABEPs or BAEPs) are medical tests that measure the electrical activity in the auditory pathway of the brain in response to sound stimulation. The test involves placing electrodes on the scalp and recording the tiny electrical signals generated by the nerve cells in the brainstem as they respond to clicks or tone bursts presented through earphones.
The resulting waveform is analyzed for latency (the time it takes for the signal to travel from the ear to the brain) and amplitude (the strength of the signal). Abnormalities in the waveform can indicate damage to the auditory nerve or brainstem, and are often used in the diagnosis of various neurological conditions such as multiple sclerosis, acoustic neuroma, and brainstem tumors.
The test is non-invasive, painless, and takes only a few minutes to perform. It provides valuable information about the functioning of the auditory pathway and can help guide treatment decisions for patients with hearing or balance disorders.
Sensorineural hearing loss (SNHL) is a type of hearing impairment that occurs due to damage to the inner ear (cochlea) or to the nerve pathways from the inner ear to the brain. It can be caused by various factors such as aging, exposure to loud noises, genetics, certain medical conditions (like diabetes and heart disease), and ototoxic medications.
SNHL affects the ability of the hair cells in the cochlea to convert sound waves into electrical signals that are sent to the brain via the auditory nerve. As a result, sounds may be perceived as muffled, faint, or distorted, making it difficult to understand speech, especially in noisy environments.
SNHL is typically permanent and cannot be corrected with medication or surgery, but hearing aids or cochlear implants can help improve communication and quality of life for those affected.
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Cochlear9
- The disease can manifest in profound SNHL, hypothesized to result from disruption of synchronous activity of the cochlear nerve. (hindawi.com)
- Navneet G, Reeta G, Abhaya L, Kalu R, Aquib M D. The Pathogenesis of Vestibule Cochlear Nerve Disease in Herpes Zoster Oticus. (juniperpublishers.com)
- Audio logical assessment in patients with herpes zoster oticus were performed to determine the biologic features of the varicella zoster virus (VZV) and the pathogenesis of vestibule cochlear nerve disease in herpes zoster oticus. (juniperpublishers.com)
- A retrospective study review of 60 patients with herpes zoster oticus was designed in order to determine the classic characteristics of vestibule cochlear nerve disease associated with the syndrome. (juniperpublishers.com)
- The findings were compared with the clinical severity of facial paralysis and patient age to clarify the pathogenesis of vestibule cochlear nerve disease in herpes zoster oticus. (juniperpublishers.com)
- It can be further divided into cochlear and retrocochlear . (wikilectures.eu)
- It had been observed that situations of SNHL in sufferers with CKD resulted additionally from cochlear dysfunction than from retrocochlear hearing pathology [8]. (healthanddietblog.info)
- These disorders can be either cochlear or retrocochlear in origin. (neurootology.org)
- Electrophysiological measures, such as those procedures listed below, play an important role in the assessment of hearing in difficult to test populations, such as very young children, as well as in the differential diagnosis of cochlear versus retrocochlear disorders. (asuspeechandhearingclinic.org)
Auditory8
- Given that CMT affects the retrocochlear auditory pathway, there have been theoretical concerns that CI is incapable of providing meaningful auditory stimulation. (hindawi.com)
- Auditory Diseases, Central" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (uchicago.edu)
- This graph shows the total number of publications written about "Auditory Diseases, Central" by people in this website by year, and whether "Auditory Diseases, Central" was a major or minor topic of these publications. (uchicago.edu)
- Below are the most recent publications written about "Auditory Diseases, Central" by people in Profiles. (uchicago.edu)
- Subject has retrocochlear or central auditory disorders 6. (participaid.co)
- In SNHL, the disorder is situated either in the cochlea itself or in virtually any from the retrocochlear auditory buildings. (lavoixdesrroms.org)
- Auditory fatigue: retrocochlear components. (cdc.gov)
- BACKGROUND AND OBJECTIVES: Auditory brainstem response (ABR) can be utilized to verify the hearing threshold and determine the existence of retrocochlear pathology in sudden deafness. (koreamed.org)
Disorders4
- Charcot-Marie-Tooth (CMT) disease is a clinically and genetically heterogeneous group of disorders affecting the peripheral nervous system. (hindawi.com)
- [ 3 ] The disease usually manifests in childhood and is more commonly observed in families with a history of asthma, allergic rhinitis , and other atopic disorders. (medscape.com)
- While tinnitus can be associated with diseases and disorders of the ear, retrocochlear diseases and vascular pathologies, there are few known risk factors for tinnitus apart from these conditions. (bmj.com)
- Subject has a history of post-adolescent chronic middle ear infections, inner ear disorders or recurring vertigo requiring treatment, disorders such as mastoiditis, Hydrops or Meniere's syndrome or disease 2. (participaid.co)
Pathology1
- When hearing loss is due to retrocochlear pathology, it is called retrocochlear hearing loss. (bvsalud.org)
Systemic disease3
- Atopic dermatitis, also known as eczema, is a systemic disease that manifests as intensely pruritic, erythematous, skin lesions. (medscape.com)
- Damage to the hearing nerve may result from trauma, inflammation, systemic disease or viruses. (deafwebsites.com)
- Other risk factors for noise induced hearing loss include smoking, presence of certain systemic disease like diabetes mellitus, cardiovascular diseases, those who have recreational drug use, chronic lead exposure, those exposed to ototoxic drugs (aminoglycosides, platinum derivatives) and industrial solvents (carbon monoxide, toluene) etc. (drsanu.com)
Dysfunction1
- Dizziness is a common associated complaint in cases of tinnitus caused by a neurological condition, vestibular dysfunction, or Meniere's disease. (rasyaclinic.com)
Vertigo1
- Tinnitus, sensorineural hearing loss (SNHL), and vertigo are common audio-vestibular symptoms and they are well-known classic triad in inner ear disease involving the membranous labyrinth [ 1 ]. (springeropen.com)
Meniere's1
- This test is useful in intraoperative monitoring and to evaluate possible cases of Meniere's disease. (asuspeechandhearingclinic.org)
Acute1
- The widespread prevalence of the new coronavirus disease (COVID-19) and associated virus severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has led to some reported cases of IFP. (medscape.com)
Centers2
Tinnitus1
- Tinnitus is not a disease - it's a symptom. (rasyaclinic.com)
Sudden1
- Idiopathic sudden sensorineural hearing loss (ISSNHL) has been considered as a common inner ear disease that precipitates s-BPPV. (frontiersin.org)
Labyrinthine1
- Otosclerosis - It is a disease of the labyrinthine capsule and stapedial footplates. (baslpcourse.com)
Autoimmune1
- Doctors may treat inflammation or underlying autoimmune disease with corticosteroids, or tumors and ear compartment fluid rupture with surgery. (deafwebsites.com)
Hearing impairment2
- These preliminary findings clearly delineate the importance of further research aimed at investigating hearing impairment in AD, to a) allow early detection of people with predisposition to AD, b) improve the quality of life in AD patients with hearing loss and c) possibly prevent the progression of the disease treating the hearing impairment. (tinnitusjournal.com)
- Hearing impairment is one of the known causes of the global burden of disease [ 1 ]. (ejao.org)
Diabetes1
- Diabetes mellitus (DM) is a non-communicable, chronic metabolic disease with abnormal blood glucose levels caused by relative or absolute insulin deficiency. (scitechnol.com)
Otosclerosis1
- Otosclerosis Otosclerosis is a disease of the bone of the otic capsule that causes an abnormal accumulation of new bone within the oval window. (msdmanuals.com)
SNHL1
- Charcot-Marie-Tooth (CMT) disease is a peripheral hereditary neuropathy associated with motor and sensory impairment and can result in profound sensorineural hearing loss (SNHL). (hindawi.com)
Cholesteatoma1
- Subject has cholesteatoma or destructive middle ear disease 4. (participaid.co)
Diagnosis1
- the authors suggested classifying the disease course into suspected, incomplete, and complete Susac syndrome to facilitate early diagnosis. (medlink.com)
Etiologically1
- Hearing loss is an etiologically diverse condition with many disease-related complications and major clinical, social, and quality of life implications. (nature.com)
Brain1
- It can also be a symptom of a more complex and serious disease (e.g. a brain tumor). (wikilectures.eu)
Surgery1
- Diseases of Ear, Nose and Throat & Head and Neck Surgery, p. 26. (wikipedia.org)
Trauma1
- Although its etiology is still elusive, BPPV falls into idiopathic and secondary categories according to causative factors, the latter include trauma, Ménière's disease, SSNHL, VN, etc. (frontiersin.org)
Graph1
- A knowledge graph of biological entities such as genes, gene functions, diseases, phenotypes and chemicals. (edu.sa)
General1
- Alzheimer's Disease (AD) is an acquired condition characterized by progressive cognitive and behavioural decline and is the second most common form of dementia in the general population after mild cognitive impairment[ 1 ]. (tinnitusjournal.com)
Neuropathy1
- Charcot-Marie-Tooth disease is the most commonly occurring hereditary motor and sensory neuropathy. (hindawi.com)
Condition1
- An early term for the condition was "boilermakers' disease," because so many workers who made steam boilers developed hearing loss. (drsanu.com)
Risk factors1
- The correct identification of AD risk factors can be helpful in intercepting the disease and slowing its progression. (tinnitusjournal.com)
Health1
- Dermietzel RHofstadter F Gap junctions in health and disease. (jamanetwork.com)
Sound1
- It is caused by any disease process interfering with the conduction of sound from the external ear to the stapediovestibular joint. (baslpcourse.com)