Abstract
Vestibules of two cases of delayed endolymphatic hydrops were examined ultrastructurally. The case 1 was a 27-year-old woman and the case 2 was a 16-year-old woman. The specimens were obtained by their translabyrinthic operations of the vestibular nerve section. In case 1, the macula utricle and the posterior crista, and in case 2, the macula utricle, the anterior crista, the posterior crista and the vestibular ganglion could be studied. These sensory organs showed the normal features. These findings indicated the histological evidence that the patients suffered a vertigo attack repeatedly because their peripheral vestibular sensory organs were intact.
