Abstract
The pathology of vestibular organs including four cases of acoustic tumor, a case of Ménière's disease and two cases of leukaemia were observed by using scanning electron microscope.
The vestibular organs of acoustic tumor and Meniere's disease were taken during surgery. Some degenerative changes of these diseases were recognized. But it is assumed that in three cases of acoustic tumor, normal sensory cilia were observed and at the surface two types of sensory cells existed.
The degeneration of stereocilia seems to occur from the shortest cilia. The degenerative change; of lateral semicircular canal of Meniere's disease was observed in the whole neurosensory epithelium and especially in the central part of the crista strong degenerative changes were recognized. The cilia of sensory cells had shortened. In the vestibular organ of leukaemia numerous global substances protruded from supporting cells.
