Lee J I, Yoon R G, Lee J H, Park J W, Yoo M H, Ahn J H, Chung J W, Park H J
From the Departments of Otolaryngology (J.I.L., J.W.P., J.H.A., J.W.C., H.J.P.).
Department of Radiology (R.G.Y.), Catholic Kwandong University International St. Mary's Hospital, Catholic Kwandong University College of Medicine, Incheon, Korea.
AJNR Am J Neuroradiol. 2016 Dec;37(12):2317-2322. doi: 10.3174/ajnr.A4901. Epub 2016 Aug 11.
According to recent research, modern MR imaging can detect the presense of abnormalities on labyrinthine. Our aim was to report the patterns and prognostic role of abnormal findings on labyrinthine imaging in patients with sudden sensorineural hearing loss.
This study comprised 113 patients who were diagnosed with unilateral sudden sensorineural hearing loss and underwent 3T MR imaging, including pre-/postcontrast 3D fluid-attenuated inversion recovery and T1-weighted imaging. We analyzed abnormalities on MR imaging and correlated them with audiometric results.
Thirty-one (27%) patients showed abnormal findings on labyrinthine MR imaging in the affected ear. The initial/final hearing levels of the MRI+ group (91 ± 25/73 ± 27 dB hearing loss) were significantly worse than those of the MRI- group (69 ± 30/48 ± 24 dB hearing loss). The incidence of abnormalities on labyrinthine MR imaging was significantly lower (3 of 40, 8%) in 40 patients with initial mild-to-moderate hearing loss than in those with profound hearing loss (16 of 34, 47%). Considering hearing improvement by the Siegel criteria, the rate of complete or partial recovery was significantly higher in the MRI- group (34%) than in the MRI+ group (10%). In patients with initial severe or profound hearing loss, the MRI- group showed greater hearing improvement (38 ± 21 dB) than the MRI+ group (23 ± 22 dB).
Abnormalities on labyrinthine MR imaging were found in 27% of patients with sudden sensorineural hearing loss. The initial hearing loss was worse in the MRI+ group than in the MRI- group. In patients with initial severe and profound hearing loss, the presence of abnormalities on labyrinthine MR imaging indicated a poor prognosis.
根据近期研究，现代磁共振成像（MR）能够检测出内耳的异常情况。我们的目的是报告突发性感音神经性听力损失患者内耳成像异常表现及其预后作用。
本研究纳入了113例被诊断为单侧突发性感音神经性听力损失并接受3T MR成像检查的患者，检查包括对比剂注射前后的三维液体衰减反转恢复序列（3D FLAIR）和T1加权成像。我们分析了MR成像上的异常情况，并将其与听力测定结果相关联。
31例（27%）患者患侧内耳的MR成像显示有异常表现。MRI阳性组（初始/最终听力损失为91±25/73±27 dB）的初始/最终听力水平明显差于MRI阴性组（69±30/48±24 dB听力损失）。40例初始听力为轻度至中度损失的患者中，内耳MR成像异常的发生率（40例中的3例，8%）显著低于重度听力损失患者（34例中的16例，47%）。按照西格尔标准衡量听力改善情况，MRI阴性组（34%）的完全或部分恢复率显著高于MRI阳性组（10%）。在初始听力为重度或极重度损失的患者中，MRI阴性组的听力改善程度（38±21 dB）大于MRI阳性组（23±22 dB）。
27%的突发性感音神经性听力损失患者内耳MR成像存在异常。MRI阳性组的初始听力损失比MRI阴性组更严重。在初始听力为重度和极重度损失的患者中，内耳MR成像存在异常表明预后较差。
