Lövblad K O, Ozdoba C, Negri S, Remonda L, Schinke D, Häusler R, Schroth G
Department of Neuroradiology, IDR, Inselspital, University of Bern, Switzerland.
J Comput Assist Tomogr. 1995 Sep-Oct;19(5):797-9. doi: 10.1097/00004728-199509000-00018.
Perilymphatic fistulas of the inner ear constitute abnormal leaks of perilymphatic fluid into the middle ear or mastoid air cell system and represent a rare cause of otorrhea. We report the case of a 5-month-old child presenting with sudden otorrhea. High resolution CT cisternography showed a malformation of the middle ear and a passage of contrast-enhanced CSF into the tympanic cavity through the left oval window. Surgery confirmed a tear of the tympanic membrane as well as a stapes malformation with aplasia of the crura and an associated perilymphatic fistula through a defect in the stapes footplate. The fistula was closed with adipose tissue from the ear lobe.
内耳外淋巴瘘是外淋巴液异常漏入中耳或乳突气房系统，是耳漏的罕见原因。我们报告一例5个月大儿童突发耳漏的病例。高分辨率CT脑池造影显示中耳畸形，对比增强的脑脊液通过左侧椭圆窗进入鼓腔。手术证实鼓膜撕裂、镫骨畸形伴脚间支发育不全以及通过镫骨底板缺损形成的相关外淋巴瘘。瘘管用耳垂的脂肪组织封闭。
