Department of Otorhinolaryngology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Acta Otolaryngol. 2020 Oct;140(10):818-822. doi: 10.1080/00016489.2020.1781927. Epub 2020 Jul 10.
High signal intensity in the endolymphatic duct (ED) is occasionally observed on magnetic resonance imaging (MRI) in ears that have otological disorders.
The signal intensity (SI) in the ED on post-contrast MRI was investigated in subjects with various otological disorders, and the meaning of high SI in the ED was evaluated.
392 patients with otological disorders and 21 controls without otological symptoms underwent 3 T MRI. The SIs of the ED and the cerebellum were measured, the SI ratio (SIR) was calculated, and ears with SIR ≥4 were identified.
A high SIR was identified in the ED of 3.7% of ears affected by definite Meniere's disease (dMD), 100% of ears affected by large vestibular aqueduct syndrome (LVAS), and 7.1% of ears with no otological symptoms. On the whole, a significant relationship was found between the existence of vestibular or cochlear EH and the SIR in the ED.
The MRI finding of high SI in the ED may indicate the mechanism of inner ear disturbances in ears with otological disorders, especially in those with LVAS, and it may suggest an underlying disorder in some ears in which otological symptoms are not apparent.
在耳部存在耳科学疾病的情况下，磁共振成像（MRI）偶尔会观察到内淋巴管（ED）高信号强度。
研究了各种耳科学疾病患者在增强后 MRI 中 ED 的信号强度（SI），并评估了 ED 中高 SI 的意义。
392 例耳部疾病患者和 21 例无耳部症状的对照组在 3T MRI 下进行检查。测量 ED 和小脑的 SI，计算 SI 比值（SIR），并确定 SIR≥4 的耳朵。
明确的梅尼埃病（dMD）患者中有 3.7%的耳朵、大前庭水管综合征（LVAS）患者中有 100%的耳朵、无症状的耳朵中有 7.1%的耳朵的 ED 中存在高 SIR。总的来说，前庭或耳蜗 EH 的存在与 ED 中的 SIR 之间存在显著关系。
MRI 发现 ED 中的高 SI 可能表明存在耳部疾病的内耳障碍机制，尤其是在 LVAS 中，并且可能提示一些耳部存在潜在疾病，但没有耳部症状。
