Moller MB, Moller AR, Jannetta PJ et al (1993) Vascular decompression surgery for severe tinnitus: selection criteria and results. J Neurosurg 93:421–426īrookes GB (1996) Vascular-decompression surgery for severe tinnitus. Okamura T, Kurokawa Y, Ikeda N et al (2000) Microvascular decompression for cochlear symptoms. Schick B, Brors D, Koch O et al (2001) Magnetic resonance imaging in patients with sudden hearing loss, tinnitus and vertigo. McCabe BF (1989) Gantz BJ (1989) Vascular loop as a cause of incapacitating dizziness. Sirikci A, Bayazit Y, Ozer E et al (2005) Magnetic resonance imaging based classification of anatomic relationship between the cochleovestibular nerve and anterior inferior cerebellar artery in patients with non-specific neuro-otologic symptoms. Girard N, Poncet M, Caces F et al (1997) Three-dimensional MRI of hemifacial spasm with surgical correlation. Anatomy, clinical aspects and microsurgery. Perneczky A (1981) The anterior inferior cerebellar artery. Lippincott Williams & Wilkins, Philadelphia, pp 2208–2230 In: Bailey BJ, Johnston JT (eds) Head and neck surgery V otolaryngology. Clin Otolaryngol 21:312–316īrackmann DE, Crawford JV, Green D (2006) Cerebellopontine angle tumors. Gorrie A, Warren FM 3rd, de la Garza AN et al (2010) Is there a correlation between vascular loops in the cerebellopontine angle and unexplained unilateral hearing loss? Otol Neurotol 31:48–52ĭe Carpentier J, Lynch N, Fisher A et al (1996) MR imaged neurovascular relationships at the cerebellopontine angle. Junior, De Abreu L, Kuniyoshi CH, Wolosker AB et al (2016) Vascular loops in the anterior inferior cerebellar artery, as identified by magnetic resonance imaging, and their relationship with otologic symptoms. Makins AE, Nikolopoulos TP, Ludman C et al (1998) Is there a correlation between vascular loops and unilateral auditory symptoms? Laryngoscope 108:1739–1742Įnsari, N, Gür, E, Selçuk, T et al (2017) Is presence of vascular loop in magnetic resonance imaging always related to tinnitus? J Craniofacial Surg 28:e295–e298 Van der Steenstraten F, de Ru JA, Witkamp TD (2007) Is microvascular compression of the vestibulocochlear nerve a cause of unilateral hearing loss? Ann Otol Rhinol Laryngol 116:248–252 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. 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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