Grading of endolymphatic hydrops using magnetic resonance imaging

• DOI: 10.1080/00016480902729827
• Publication Date: 2009-02-17T02:04:09Z
• Authors: Tsutomu Nakashima; Shinji Naganawa; Ilmari Pyykkö; William P.R. Gibson; Michihiko Sone; Seiichi Nakata; Masaaki Teranishi
• Keywords: Endolymphatic hydrops; Vestibule; Perilymph; Cochlear duct; Saccule; Endolymph

Conclusion: Grading of endolymphatic hydrops in the vestibule and cochlea using magnetic resonance imaging (MRI) is proposed (2008 Nagoya scale). Objective: To standardize evaluation both MRI. Patients methods: The space was evaluated after intratympanic gadolinium injection three-dimensional fluid attenuated (3D-FLAIR) MRI real inversion recovery (3D-real IR) Results: A simple three-stage grading system acceptable for cochlea: none, mild, significant. In vestibule, determined by ratio area to vestibular (sum perilymphatic spaces). with no have a one-third or less, those mild between half, significant more than 50%. cochlea, patients classified as having show displacement Reissner's membrane; membrane but does not exceed scala vestibuli; exceeds vestibuli.