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Does the location of a vascular loop in the cerebellopontine angle explain pulsatile and non-pulsatile tinnitus?

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Abstract

The purpose was to investigate patients with unexplained pulsatile and non-pulsatile tinnitus by means of MR imaging of the cerebellopontine angle (CPA) and to correlate the clinical subtype of tinnitus with the location of a blood vessel (in the internal auditory canal or at the cisternal part of the VIIIth cranial nerve). Clinical presentation of tinnitus and perceptive hearing loss were correlated. In 47 patients with unexplained tinnitus, an MR examination of the CPA was performed. Virtual endoscopy reconstructions were obtained using a 3D axial thin-section high-resolution heavily T2-weighted gradient echo constructive interference in steady state (CISS) data-set. High-resolution T2-weighted CISS images showed a significantly higher number of vascular loops in the internal auditory canal in patients with arterial pulsatile tinnitus compared to patients with non-pulsatile tinnitus (P<0.00001). Virtual endoscopy images were used to investigate vascular contacts at the cisternal part of the VIIIth cranial nerve in patients with low pitch and high pitch non-pulsatile tinnitus. A significantly different distribution of the vascular contacts (P=0.0320) was found. Furthermore, a correlation between the clinical presentation of non-pulsatile tinnitus (high pitch and low pitch) and the perceptive hearing loss was found (P=0.0235). High-resolution heavily T2-weighted CISS images and virtual endoscopy of the CPA can be used to evaluate whether a vascular contact is present in the internal auditory canal or at the cisternal part of the VIIIth cranial nerve and whether the location of the vascular contact correlates with the clinical subtype of tinnitus. Our findings suggest that there is a tonotopical structure of the cisternal part of the VIIIth cranial nerve. A correlation between the clinical presentation of tinnitus and hearing loss was found.

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Authors and Affiliations

  1. Department of Radiology, University of Antwerp, Wilrijkstraat 10, 2650, Edegem, Belgium

    V. Nowé, X. L. Wang, J. Gielen, J. Van Goethem, Ö. Özsarlak, A. M. De Schepper & P. M. Parizel

  2. Department of Neurosurgery, University of Antwerp, Wilrijkstraat 10, 2650, Edegem, Belgium

    D. De Ridder

  3. Department of Otorhinolaryngology, University of Antwerp, Wilrijkstraat 10, 2650, Edegem, Belgium

    P. H. Van de Heyning

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  1. V. Nowé
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  2. D. De Ridder
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  3. P. H. Van de Heyning
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  4. X. L. Wang
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  5. J. Gielen
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  6. J. Van Goethem
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  7. Ö. Özsarlak
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  8. A. M. De Schepper
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  9. P. M. Parizel
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Correspondence to P. M. Parizel.

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Nowé, V., De Ridder, D., Van de Heyning, P.H. et al. Does the location of a vascular loop in the cerebellopontine angle explain pulsatile and non-pulsatile tinnitus?. Eur Radiol 14, 2282–2289 (2004). https://doi.org/10.1007/s00330-004-2450-x

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  • DOI: https://doi.org/10.1007/s00330-004-2450-x

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