Superior semicircular canal dehiscence syndrome by the superior petrosal sinus
Superior semicircular canal dehiscence syndrome by the superior petrosal sinus
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DOI：
10.1136/jnnp.2008.155564
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发表时间：
2010-04-01
影响因子：
11
通讯作者：
Kim, Ji Soo
中科院分区：
文献类型：
--
作者：
Koo, Ja-Won;Hong, Sung Kwang;Kim, Ji Soo
上级半规管变薄或裂开可能发生在颅中窝底或邻近上级岩窦（SPS）。然而，以前没有描述过SPS引起的上级椎管裂开的症状性病例。一名45岁女性出现左侧脉动性耳鸣、自鸣和不平衡。检查示传导性听力下降，左侧前庭诱发肌源性电位阈值降低。声、振动刺激和左耳正压吹气诱发的眼震主要为扭转性，而不是垂直-扭转性。高分辨率颞骨CT显示靠近总骨的上级管裂开，被SPS包裹。经颅中窝入路封堵裂开后，症状和体征消退。SPS的深沟可能导致靠近共同沟的上级半规管裂开，上级半规管和后半规管的共同刺激可能解释了声音和振动刺激引起的主要扭转性眼球震颤。
Thinning or dehiscence of the superior semicircular canal may occur on the middle cranial fossa floor or adjacent to the superior petrosal sinus (SPS). However, no symptomatic cases of superior canal dehiscence by SPS have been previously described. A 45-year-old woman presented with left-side pulsating tinnitus, autophony and disequilibrium. Examination showed conductive hearing loss and decreased threshold of vestibular evoked myogenic potential in the left side. Sound and vibration stimuli and positive pressure insufflations into the left ear evoked mainly torsional nystagmus instead of vertical-torsional nystagmus. High-resolution temporal bone CT revealed a dehiscence of the superior canal close to the common crus, which was encased by SPS. Symptoms and signs resolved after plugging the dehiscence through a middle fossa approach. Deep groove of SPS may cause superior canal dehiscence close to the common crus, and costimulation of the superior and posterior canals may explain the mainly torsional nystagmus induced by sound and vibration stimuli.