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Clinical Neurophysiology : Official... Sep 2015
Topics: Electromyography; Facial Nerve; Female; Humans; Male; Monitoring, Intraoperative; Neuroma, Acoustic
PubMed: 25680949
DOI: 10.1016/j.clinph.2015.01.002 -
Neurology India Sep 2006
Topics: Adult; Brain Stem; Female; Humans; Magnetic Resonance Imaging; Neurofibromatoses; Neuroma, Acoustic; Neurosurgery
PubMed: 16936415
DOI: 10.4103/0028-3886.27180 -
Acta Medica Portuguesa May 1993A revision is made of the initial symptoms in acoustic neuroma. The authors propose a study protocol to achieve an early diagnosis of this tumor. (Review)
Review
A revision is made of the initial symptoms in acoustic neuroma. The authors propose a study protocol to achieve an early diagnosis of this tumor.
Topics: Clinical Protocols; Humans; Methods; Neuroma, Acoustic; Time Factors; Vestibulocochlear Nerve
PubMed: 8337953
DOI: No ID Found -
The Journal of the American Osteopathic... Jun 1986
Topics: Diagnosis, Differential; Humans; Neuroma, Acoustic; Tomography, X-Ray Computed
PubMed: 3733486
DOI: No ID Found -
The Journal of Laryngology and Otology Oct 1978The importance of speech audiometry in cases of sensori-neural deafness has been stressed. Four cases have been described clearly elucidating this point. Speech...
The importance of speech audiometry in cases of sensori-neural deafness has been stressed. Four cases have been described clearly elucidating this point. Speech audiometry is within the means of most practising otologists. The appropriate apparatus is not expensive, nor is the method excessively time-consuming. In acoustic neuroma the damage to the cochlear nerve fibres may produce very little reduction in the hearing threshold level for pure tones, but a disproportionately large reduction in the discrimination score, often when the tumour is large enough to be causing brain stem compression. The disproportion is an important indicator to the presence of retro-cochlear pathology, of which acoustic neuroma is the most likely cause, a diagnosis which must be considered in every case of unilateral sensori-neural deafness.
Topics: Adult; Audiometry; Deafness; Female; Humans; Male; Middle Aged; Neuroma, Acoustic; Speech Discrimination Tests
PubMed: 712216
DOI: 10.1017/s0022215100086217 -
The Laryngoscope Jan 2002Generally, patients with small acoustic neuroma have less facial palsy after its removal. The middle cranial fossa approach is mainly applied to the small acoustic...
OBJECTIVE/HYPOTHESIS
Generally, patients with small acoustic neuroma have less facial palsy after its removal. The middle cranial fossa approach is mainly applied to the small acoustic neuroma and tumor size does not influence the prognosis of facial palsy. The internal auditory canal cannot be fully opened in the middle cranial fossa approach, and the facial nerve is tightly attached in the fundus. According to these anatomical factors, we hypothesized that acoustic neuromas located away from the fundus might be removed with less facial nerve damage. We investigated the distance between the acoustic neuroma and fundus and its clinical relationship.
STUDY DESIGN
Retrospective study of 45 patients with acoustic neuroma who underwent a middle cranial fossa approach.
METHODS
The distance between the acoustic neuroma and fundus and the tumor diameter were measured on T2-weighted and contrast-enhanced magnetic resonance images, respectively. These data were compared with the postoperative facial nerve function.
RESULTS
The mean distance was 3.0 +/- 1.8 mm (range, 0-10 mm), and the mean diameter was 11.3 +/- 3.7 mm (means +/- standard deviation; range, 4-20 mm). Neither the distance nor the diameter had any correlation to the degrees of postoperative facial palsy either immediately or at 3 months after surgery.
CONCLUSIONS
As far as the nerve was anatomically preserved, postoperative facial nerve function seemed to be influenced by factors other than surgical manipulation among small acoustic neuromas. Although the tumor fills in the fundus, it may not influence postoperative facial nerve function and also may not interfere with indication of the middle cranial fossa approach for removal of the acoustic neuroma.
Topics: Adult; Facial Nerve; Facial Paralysis; Female; Humans; Magnetic Resonance Imaging; Male; Microsurgery; Middle Aged; Neuroma, Acoustic; Postoperative Complications; Retrospective Studies; Risk Factors
PubMed: 11802057
DOI: 10.1097/00005537-200201000-00029 -
Progress in Neurological Surgery 2019Vestibular schwannomas (VS) are benign tumors predominantly originating from the balance portion of cranial nerve VIII. These tumors have an incidence of 1-2 per 100,000... (Review)
Review
Vestibular schwannomas (VS) are benign tumors predominantly originating from the balance portion of cranial nerve VIII. These tumors have an incidence of 1-2 per 100,000 people. The growth of these tumors is approximately 1-2 mm per year. A VS can result in significant neurologic dysfunction from continued growth or the management paradigms designed to control this predominantly benign tumor. The impacts on the critical space within the auditory canal and cerebellopontine angle can lead to hearing deficits, tinnitus, vestibular dysfunction, facial nerve deficits, and brain stem compression.
Topics: Humans; Neuroma, Acoustic; Radiosurgery
PubMed: 31096208
DOI: 10.1159/000493053 -
British Journal of Hospital MedicineAcoustic schwannomas are the commonest tumours of the cerebellopontine angle and usually present with unilateral deafness. Earlier diagnosis while the tumour is small,... (Review)
Review
Acoustic schwannomas are the commonest tumours of the cerebellopontine angle and usually present with unilateral deafness. Earlier diagnosis while the tumour is small, coupled with surgical treatment by a specialized neuro-otology team, has contributed to a significant decrease in the mortality and morbidity due to these tumours.
Topics: Cerebellar Neoplasms; Cerebellopontine Angle; Humans; Incidence; Neuroma, Acoustic
PubMed: 8472085
DOI: No ID Found -
Acta Otorhinolaryngologica Italica :... Aug 2018The current treatment options for acoustic neuromas (AN) - observation, microsurgery and radiotherapy - should assure no additional morbidity on cranial nerves VII and... (Comparative Study)
Comparative Study
The current treatment options for acoustic neuromas (AN) - observation, microsurgery and radiotherapy - should assure no additional morbidity on cranial nerves VII and VIII. Outcomes in terms of disease control and facial function are similar, while the main difference lies in hearing. From 2012 to 2016, 91 of 169 patients (54%) met inclusion criteria for the present study, being diagnosed with unilateral, sporadic, intrameatal or extrameatal AN up to 1 cm in the cerebello-pontine angle; the remaining 78 patients (46%) had larger AN and were all addressed to surgery. The treatment protocol for small AN included observation, translabyrinthine surgery, hearing preservation surgery (HPS) and radiotherapy. Hearing function was assessed according to the Tokyo classification and the American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS) classification. Sixty-one patients (71%) underwent observation, 19 (22%) HPS and 6 (7%) translabyrinthine surgery; 5 patients were lost to follow-up. Median follow-up was 25 months. In the observation group, 24.6% of patients abandoned the wait-and-see policy for an active treatment; the risk of switching from observation to active treatment was significant for tumour growth (p = 0.0035) at multivariate analysis. Hearing deteriorated in 28% of cases without correlation with tumour growth; the rate of hearing preservation for classes C-D was higher than for classes A-B (p = 0.032). Patients submitted to HPS maintained an overall preoperative hearing class of Tokyo and AAO-HNS in 63% and 68% of cases, respectively. Hearing preservation rate was significantly higher for patients presenting with preoperative favourable conditions (in-protocol) (p = 0.046). A multi-option management for small AN appeared to be an effective strategy in terms of hearing outcomes.
Topics: Combined Modality Therapy; Female; Hearing; Humans; Male; Middle Aged; Neuroma, Acoustic; Prospective Studies
PubMed: 30197430
DOI: 10.14639/0392-100X-1756 -
The Canadian Journal of Neurological... Nov 2003Among cases of cerebellopontine angle lesions, vascular lesions involving the internal auditory canal are extremely rare. We report a distal fusiform mycotic... (Review)
Review
BACKGROUND
Among cases of cerebellopontine angle lesions, vascular lesions involving the internal auditory canal are extremely rare. We report a distal fusiform mycotic pseudoaneurysm of the anterior inferior cerebellar artery (AICA) that simulated an acoustic neuroma on presentation.
METHODS
A 60-year-old woman was investigated for recent onset of acute dizziness. Laboratory and radiographic investigations are presented, as well as the surgical management of the patient and pathological examination of the aneurysm.
CONCLUSIONS
An exceptionally rare case of distal mycotic intracanalicular pseudoaneurysm of the AICA with intraluminal thrombus and fusiform anatomy is described. In our review of the literature (1966-present), only five other intracanalicular AICA-aneurysms were encountered, none of which were infectious in etiology. The possible pathophysiologic mechanisms of distal AICA-aneurysms are discussed along with the currently available literature.
Topics: Adult; Aged; Cerebellum; Diagnosis, Differential; Ear Canal; Female; Humans; Intracranial Aneurysm; Middle Aged; Neuroma, Acoustic
PubMed: 14672274
DOI: 10.1017/s0317167100003139