Vestibular Meniere's disease was diagnosed in 18 patients in Gifu University Hospital from January 1987 to October 1989. We review here the electrocochleograms, the course of vertigo, the course of cochlear symptoms and hearing tests, and the incidence of central nervous system disease.
1 . Three patients had increased -SP. The side of increased -SP corresponded with the side of canal paresis in all cases.
2. The patients were divided into five groups according to the course of vertigo ; 1 patient had sporadic attacks. 8 patients had periodic attacks. 3 patients had frequent attacks in a short period of time. 2 patients had sporadic attacks but recently the frequency increased. In 3 patients, the outcome was unclear, because the periods of observation were short.
3. In 2 patients, fluctuating hearing loss was noted in hearing tests. The side of hearing loss was the same as the side of canal paresis. We diagnosed pre-Ménière's disease, but they were not aware of fluctuating hearing loss. Therefore, periodical hearing tests are necessary for observations of vestibular Meniere's disease.
4. In one patient, tumor of the fourth ventricle was detected.
5. Seven patients had repeated attacks of vertigo in a long time without cochlear signs and disease of the central nervous system.