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Erschienen in: European Radiology 11/2010

01.11.2010 | Head and Neck

Differential diagnosis and prognosis of T1-weighted post-gadolinium intralabyrinthine hyperintensities

verfasst von: F. Dubrulle, R. Kohler, C. Vincent, P. Puech, O. Ernst

Erschienen in: European Radiology | Ausgabe 11/2010

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Abstract

Objectives:

The aim of this longitudinal study is to describe the different intralabyrinthine lesions yielding high signal intensity on T1-weighted (T1W) images after intravenous gadolinium and then to analyze the follow-up of these patients.

Methods:

Thirty-seven patients were included and followed clinically and radiologically. A precise analysis of MR labyrinthine signals allowed exact depiction of the different lesions. Special interest is focused on the intralabyrinthine fluid signal on 3D high-resolution T2W images.

Results:

The enhanced T1W labyrinthine hyperintensities correspond to two different categories: intralabyrinthine enhancement (15 intralabyrinthine schwannomas, 13 labyrinthitis, 1 inflammatory granuloma) and spontaneous T1W hyperintensities (8 intralabyrinthine hemorrhages). Hemorrhagic lesions show a substantial decrease of the intralabyrinthine fluid signal on the 3D HRT2 that evolves to ossification. In labyrinthitis, the importance of the initial labyrinthine fluid signal decrease on the 3D HRT2 is well correlated with the hearing prognosis.

Conclusion:

A meticulous analysis of inner ear lesions allows various intralabyrinthine lesions, in particular schwannomas, to be differentiated from labyrinthitis. T1W imaging without gadolinium is essential for the correct diagnosis of rapidly evolving hearing loss. In labyrinthitis and intralabyrinthine hemorrhage, 3D HRT2 brings an interesting prognostic factor for the chance of hearing recovery.
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Metadaten
Titel
Differential diagnosis and prognosis of T1-weighted post-gadolinium intralabyrinthine hyperintensities
verfasst von
F. Dubrulle
R. Kohler
C. Vincent
P. Puech
O. Ernst
Publikationsdatum
01.11.2010
Verlag
Springer-Verlag
Erschienen in
European Radiology / Ausgabe 11/2010
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-010-1835-2

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