J Radiosurg SBRT 3:247–255Ĭho YH, Lee SH, Park CW et al (2012) The association of anterior inferior cerebellar artery in IAC with tinnitus and hearing loss. Moosa S, Fezeu F, Kesser BW et al (2015) Sudden unilateral hearing loss and vascular loop in the internal auditory canal: case report and review of literature. McDermott AL, Dutt SN, Irving RM et al (2003) Anterior inferior cerebellar artery syndrome: fact or fiction? Clin Otolaryngol 28:75–80 Microsurgical anatomy and pathological consideration. Ouaknine GE (1982) The arterial loops of the pontocerebellar angle. Janetta PJ (1975) Neurovascular cross-compression in patients with hyperactive dysfunction of the eighth cranial nerve. Such VLs should be considered an incidental rather than causal findings. We did not identify any significant correlation between the laterality of VLs and the laterality of symptoms, irrespective of the grading of the loop or the patients’ age. All patients were reassured and discharged without any representation in three years follow-up. There was also no association between the presence of the loop and the patients’ age ( p = 0.5). The comparison between the grading of the VL and the laterality of symptoms did not reach the level of significance ( p = 0.321). There were 37 Type 1 loops, 29 Type 2 loops and 11 Type 3 loops. ResultsĪ total of 77 VL were identified in 64 patients (0.9%) 39 patients had the VL on the same side of the main symptom, while 25 patients had the VL on the contralateral side. We performed a statistical correlation between the laterality of the VL in the IAM/ CPA as graded according to the Chavda classification (type 1 in the CPA, type 2 extending in the IAM, type 3 extending to the distal IAM end), the laterality of symptoms and the patient’s age. Out of 6978 patients undergoing magnetic resonance imaging (MRI) of the IAM for unilateral cochleovestibular symptoms we identified the ones with VLs and reviewed their medical notes.
INTERNAL AUDITORY MEATUS SERIES
We carried out a retrospective case series in a tertiary referral centre. To determine the clinical significance of vascular loops (VL) in the internal auditory meatus (IAM) and cerebellopontine angle (CPA).
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