Relationship between Vestibulocochlear Symptoms and Types of the Anterior Inferior Cerebellar Artery (AICA) Pathway in Cerebellopontine Angle

Kim, Minbum; Chu, Hosuk; Song, Min Young; Lee, Sang Duck; Kim, Heung Dong

doi:10.35420/jcohns.2012.23.1.74

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…However, studies conducted by Bhatia A et al [1] and Kazawa N et al [14] showed that AICA type 1 was most commonly associated with unexplained tinnitus. In contrast, Kim M et al [16] suggested in their study that tinnitus was more frequent with AICA type 3.…”

Section: Discussionmentioning

confidence: 75%

Anterior inferior cerebellar artery loop and tinnitus—is there any association between them?

Saraf

Gupta

Manhas

et al. 2022

Egypt J Otolaryngol

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Background Where there is no identifiable cause of otologic symptoms like hearing loss and tinnitus, it is believed that etiology could possibly involve a vascular loop in AICA compressing the vestibulo-cochlear nerve within the internal auditory canal. In this study, we aim to evaluate whether there is any association of AICA vascular loops with unexplained tinnitus. Methods The present prospective study was conducted in the Department of ENT, SMGS Hospital, GMC Jammu, from October 2020 to March 2022 on 131 subjects with unexplained tinnitus. All subjects were subjected to contrast enhanced MRI brain (3D fast spin echo T2W1 with drive equilibrium pulse) for evaluation of AICA using Chavda classification—type 1 (lying in CP angle, but not entering IAC), type 2 (entering IAC but extending < 50% of length of IAC), and type 3 (extending > 50% of length of IAC). Results Out of 131 unexplained tinnitus cases, 76 patients (58%) had AICA loop on MRI. Out of 16 patients with right sided tinnitus, 11 patients had AICA on same side, while 5 patients had AICA on the opposite (left) side. Out of 26 patients with left-sided tinnitus, 12 patients had AICA on same side, while 14 patients had AICA on the opposite (right) side, these findings being statistically insignificant (p = 0.153). Conclusion From our study, we can conclude that the presence of AICA vascular loop either on CP angle or within IAC in tinnitus patients is an incidental finding and has no role in its etiology.

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Section: Discussionmentioning

confidence: 75%

Anterior inferior cerebellar artery loop and tinnitus—is there any association between them?

Saraf

Gupta

Manhas

et al. 2022

Egypt J Otolaryngol

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“…Therefore, we elected to verify the smallest vertical diameter in addition to conventional dimensions in both the axial and coronal planes to avoid misdiagnosis. In fact, the association between otological symptoms and vascular loop are still controversial [ 58 , 59 , 60 , 61 , 62 ]. This relationship has been related to the loop location following Chavda classification [ 63 ].…”

Section: Discussionmentioning

confidence: 99%

“…While Yoo et al reported that tinnitus was significantly higher when the loop lies within the cerebellopontine angle (Type I) and when the loop is extended within less than 50% of the IAC (Type II) [ 59 ]. Kim et al found that tinnitus was significantly related to loops’ extension more than 50% (Type III) [ 60 ]. Hearing loss was significantly associated with loops running between the CN VII and CN VIII [ 61 ].…”

Section: Discussionmentioning

confidence: 99%

The Narrowed Internal Auditory Canal: A Distinct Etiology of Pediatric Vestibular Paroxysmia

Idriss

Thai‐Van

Altaisan

et al. 2022

JCM

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Vestibular paroxysmia (VP) is a disorder encountered in the pediatric population that etiology has been attributed to neurovascular cross-compression syndrome (NVCC). The purpose of this study was to report a new probable pathological condition, the narrowed internal auditory canal (IAC), which appears to be involved in the development of a clinical picture of VP in the pediatric population. A retrospective descriptive comparative study was conducted to compare clinical, electrophysiological, radiological, and therapeutic outcomes in both etiologies. Overall, 16 pediatric patients suffering from VP were included and divided into two groups: patients with narrowed internal auditory (Group 1) were compared to those with NVCC syndrome (Group 2). Patients in both groups were similar in terms of auditory complaints, as well as hearing, vestibular, and electrophysiological status. A narrowed IAC was encountered in the adolescent age category and females, especially those with rapid growth. The diagnosis requires a careful analysis of the shape and diameters of the IAC. Radiologic measurements in the axial plane do not seem to be sufficient to confirm the diagnosis, and, therefore, an analysis of diameters in the coronal plane is required. Treatment with sodium-channel blockers drugs showed promising results not only by relieving vertigo but also by normalizing the electrophysiological findings. In conclusion, a narrowed IAC can be considered in patients suffering from VP.

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Relationship between Vestibulocochlear Symptoms and Types of the Anterior Inferior Cerebellar Artery (AICA) Pathway in Cerebellopontine Angle

Cited by 2 publications

References 8 publications

Anterior inferior cerebellar artery loop and tinnitus—is there any association between them?

Anterior inferior cerebellar artery loop and tinnitus—is there any association between them?

The Narrowed Internal Auditory Canal: A Distinct Etiology of Pediatric Vestibular Paroxysmia

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