Venkatasamy Aina, Foll Daphné Le, Eyermann Carine, Vuong Hella, Rohmer Dominique, Charpiot Anne, Veillon Francis
Service de Radiologie 1, Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg, 1 avenue Molière, 67098, Strasbourg CEDEX, France.
Université de Strasbourg, INSERM IRFAC UMR_S1113, Laboratory Stress Response and Innovative Therapy "Streinth", Strasbourg, 67200, France.
Eur Arch Otorhinolaryngol. 2019 Apr;276(4):1029-1034. doi: 10.1007/s00405-019-05294-y. Epub 2019 Feb 6.
Lateral semicircular canal (LSCC) malformations are one of the most common inner ear malformations. The purpose of this study is to analyze the prevalence and type of hearing losses associated with LSCC malformations, compared to a control group.
We retrospectively included 109 patients (166 ears) presenting with a CT-confirmed LSCC malformation, compared to a control group (24 patients). The bony island surface and the width of the inner portion of the LSCC were measured to confirm the malformation. There results were correlated to audiogram data: sensorineural (SHNL), mixed (MHL) or conductive hearing loss (CHL) by an otologist.
In the LSCC group, 60.9% of patients presented with an audiogram-confirmed hearing loss, especially SNHL (39.2%, n = 65) and MHL (12.7%, n = 21). Hearing was normal in 39.2% (n = 65) of the cases. Bilateral LSCC malformations (n = 57) were frequently associated with hearing loss (80.7%), SNHL in most of the cases (33.3%). Unilateral LSCC malformations were associated with hearing alterations (51.9%, n = 27), but we also observed a high rate (81%, n = 42) of contralateral abnormalities of the audiogram.
LSCC malformations are commonly associated with hearing loss (61%), especially SHNL (39%). The high rate (81%) of contralateral hearing disturbances in unilateral LSCC malformations should be taken into account in the patient's daily life to avoid triggering or exacerbating any hearing loss. Otologists and radiologists must cooperate to ensure that all malformations are correctly described on CT, especially to improve the patient's education regarding hearing preservation.
外侧半规管（LSCC）畸形是最常见的内耳畸形之一。本研究的目的是分析与LSCC畸形相关的听力损失的患病率和类型，并与对照组进行比较。
我们回顾性纳入了109例经CT证实有LSCC畸形的患者（166耳），并与一个对照组（24例患者）进行比较。测量了LSCC内部的骨岛表面和宽度以确认畸形。这些结果与听力图数据相关：由耳科医生判断为感音神经性（SHNL）、混合性（MHL）或传导性听力损失（CHL）。
在LSCC组中，60.9%的患者经听力图证实有听力损失，尤其是感音神经性听力损失（39.2%，n = 65）和混合性听力损失（12.7%，n = 21）。39.2%（n = 65）的病例听力正常。双侧LSCC畸形（n = 57）常与听力损失相关（80.7%），大多数病例为感音神经性听力损失（33.3%）。单侧LSCC畸形与听力改变相关（51.9%，n = 27），但我们也观察到听力图对侧异常的高发生率（81%，n = 42）。
LSCC畸形常与听力损失相关（61%），尤其是感音神经性听力损失（39%）。单侧LSCC畸形对侧听力障碍的高发生率（81%）在患者日常生活中应予以考虑，以避免引发或加重任何听力损失。耳科医生和放射科医生必须合作，确保在CT上正确描述所有畸形，特别是为了提高患者对听力保护的认识。
