Casale M, Errante Y, Sabatino L, Incammisa A, Salvinelli F, Quattrocchi C C
Otolaryngology and Radiology; University Campus Bio-Medico of Rome, Rome, Italy.
Eur Rev Med Pharmacol Sci. 2014;18(23):3549-50.
Perilymphatic fistula (PLF) is an abnormal condition in which a communication is present between the perilymphatic space of the inner ear and the middle ear or mastoid, secondary to a dehiscence in the otic capsule, oval or round window. LF may induce hearing loss, tinnitus, aural fullness, vertigo, disequilibrium, or a combination of these symptoms; the vagueness of symptoms caused by PLF and the lack of specificity of clinical signs and symptoms make the diagnosis elusive. We report a video of a positive PLF test induced by the application of pressure on the tragus, just anterior to the left external auditory canal in a patient with cholesteatoma and PLF of lateral semicircular canal confirmed by CT scan imaging. https://www.youtube.com/watch?v=x5MhSILF9O4.
外淋巴瘘（PLF）是一种异常情况，即内耳外淋巴间隙与中耳或乳突之间存在连通，继发于耳囊、椭圆窗或圆窗的裂开。外淋巴瘘可能导致听力损失、耳鸣、耳闷、眩晕、平衡失调或这些症状的组合；外淋巴瘘引起的症状模糊以及临床体征和症状缺乏特异性使得诊断难以捉摸。我们报告了一段视频，在一名经CT扫描成像证实患有胆脂瘤和外侧半规管外淋巴瘘的患者中，通过按压左耳外耳道前方的耳屏诱发了阳性外淋巴瘘试验。https://www.youtube.com/watch?v=x5MhSILF9O4 。
