Vascular Loops in Internal Auditory Canal as Possible Cause of Ménière's Disease

Kanzaki, Jin; Koyama, Etsuko

doi:10.1016/s0385-8146(86)80063-3

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…The compression of facial nerve is frequently, and cause hemifacial spasm [22]. The compression of the auditory and vestibular nerve trunks by vascular loops might cause sensorineural hearing loss, tinnitus and vertigo [2][3][4].…”

Section: Discussionmentioning

confidence: 99%

“…The presence of vascular loops in the internal auditory canal (IAC), formed by the anterior inferior cerebellar artery (AICA), is a common finding in the systematic study of MRIs [1,2]. Controversial results have been reported in the literature about the relationship between vascular compression of the vestibular nerve trunks and neuro-otologic symptoms, and some authors have suggested that compression of the nerve might be the origin of otherwise unexplained as hearing loss, tinnitus, neurological symptoms and vertigo [3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Vascular Loops and Neuro-Otologic Symptoms: Is There Any Correlation?

Fidalgo¹,

Rodríguez-Valiente²,

González³

et al. 2013

IJOHNS

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Objective: To determine the relationship between vascular loops in the internal auditory canal and otologic symptoms. Methods: We performed a retrospective study, with a systematic review of the literature and analyzed the magnetic resonances imaging (MRI) of 91 patients attended in the ENT department since April to June 2013, in order to correlate radiological findings with otologic symptoms. Results: Vascular loops were seen in the internal auditory canal of patients without clinical symptoms; however an association was found between the presence of vascular compression of the eighth nerve displayed on MRI and the presence of sensorineural hearing loss and tinnitus. No association was found between vertigo and vascular loops. Conclusion: The presence of vascular loops in the internal auditory canal may be an incidental finding in MRIs of patients without clinical symptoms. However, in patients with tinnitus or sensorineural hearing loss that is unexplained by other clinical pathologies, these may be correlated with the existence of vascular loops which compress the eighth cranial nerve or contact the bone wall of the internal auditory canal. Further studies involving a larger number of patients are required to accurately evaluate the association between these symptoms and vascular loops.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vascular Loops and Neuro-Otologic Symptoms: Is There Any Correlation?

Fidalgo¹,

Rodríguez-Valiente²,

González³

et al. 2013

IJOHNS

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“…The etiology is multifactorial, which may involve excessive endolymph production and decreased endolymph absorption by the endolymphatic sac [ 15 ]. Although a previous case report showed the vascular loops in MD patients who were diagnosed clinically [ 16 ], neurovascular compression in CPA-IAC is not generally considered as the etiology of MD. To further understand the causal relationship between the vascular compression and audio-vestibular disorders, investigation involving larger sample size is warranted.…”

Section: Introductionmentioning

confidence: 99%

Radiological presence of vascular loops in the cerebellopontine angle region in patients with unilateral Ménière’s disease

Lei

Xia

et al. 2023

Eur Arch Otorhinolaryngol

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Objective The relationship between vascular compression of the vestibulocochlear nerve and audio-vestibular symptoms remains controversial. We aimed to examine the radiological features of vascular loops signs in cerebellopontine angle (CPA) and internal auditory canal (IAC) in patients with unilateral Ménière’s disease (MD). Methods One hundred and thirty-seven patients with unilateral definite MD and 69 control subjects (138 ears) were enrolled. All subjects received magnetic resonance imaging of CPA-IAC. The configuration of vascular loops in CPA-IAC, based on the Kazawa classification system, from MD-affected, non-affected and control ears were compared. The associations between imaging findings and Ménière’s stage, electrocochleogram (EcochG) and caloric test were analyzed. Results (1) Among the MD-affected ears, 6 cases (4.4%) were classified as Kazawa type IA, 27 cases (19.7%) as IB, 60 cases (43.8%) as IIA, and 44 cases (32.1%) as IIB. No significant interaural difference in the distribution of Kazawa's types was found ($${x}^{2}$$ x 2 = 4.737, p = 0.578) in unilateral MD patients. (2) The distribution of Kazawa's types were not significantly different between the MD-affected ears and the control subjects ($${x}^{2}$$ x 2 = 2.876, p = 0.411). (3) No relationship was found between Kazawa staging of the MD-affected ear and Ménière’s stage (H = 2.679, p = 0.444), EcochG ($${x}^{2}$$ x 2 = 0.827, p = 0.867) and caloric test ($${x}^{2}$$ x 2 = 4.116, p = 0.248). Conclusions In patients with unilateral MD, the configuration of vascular loops in CPA-IAC region, measured by Kazawa criteria, did not correlate with the laterality, clinical stage, the results of EcochG and caloric test, suggesting that vascular loops may be natural anatomical variations for patients with MD.

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The anterior inferior cerebellar artery in the internal auditory canal

Reißer

Schuknecht

1991

The Laryngoscope

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It has been proposed that compression of the auditory and vestibular nerve trunks by vascular loops might be the cause of otherwise unexplained hearing loss, tinnitus, and vertigo, as well as Meniere's disease. We studied the human temporal bone histological collection at the Massachusetts Eye and Ear Infirmary to determine whether audiovestibular symptoms could be correlated with the presence of the anterior inferior cerebellar artery within the internal auditory canal. Anterior inferior cerebellar artery loops were found within the internal auditory canals of 12.3% of 1327 temporal bones, about half the number found when preparations with intact brains are studied. This difference can be attributed to avulsion of the anterior inferior cerebellar artery during removal of the brain at autopsy. There were 5 cases of unexplained unilateral hearing loss with anterior inferior cerebellar artery loops: 3 in the opposite ear and 2 in both ears. There were 2 cases with unilateral unexplained tinnitus with anterior inferior cerebellar artery loops: 1 in the involved ear and 1 in the opposite ear. A case with bilateral tinnitus had an anterior inferior cerebellar artery loop in 1 ear. There were 29 cases of vertigo with no peripheral histopathological correlate or central nervous system disorder; anterior inferior cerebellar artery loops were found in the internal auditory canals of 7 (12.5%) of the 56 ears in this group, which is not significantly different from the 12.3% incidence recorded for the entire collection. In 23 cases of unilateral Meniere's disease, there were anterior inferior cerebellar artery loops in the hydropic ears in 3, the opposite ear in 1, and both ears in 1. We can find no correlation between unexplained hearing loss, tinnitus, vertigo, or Meniere's disease and the presence of the anterior inferior cerebellar artery in the internal auditory canal.

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Vascular Loops in Internal Auditory Canal as Possible Cause of Ménière's Disease

Cited by 4 publications

References 10 publications

Vascular Loops and Neuro-Otologic Symptoms: Is There Any Correlation?

Vascular Loops and Neuro-Otologic Symptoms: Is There Any Correlation?

Radiological presence of vascular loops in the cerebellopontine angle region in patients with unilateral Ménière’s disease

The anterior inferior cerebellar artery in the internal auditory canal

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