末梢性めまいの画像評価

抄録

　Imaging examinations, such as computed tomography (CT) or magnetic resonance imaging (MRI), could provide useful information in the diagnosis of peripheral disequilibrium. Visualization of the endolymphatic hydrops (EH) by 3-T MRI with gadolinium injection has contributed to the diagnosis of Meniere's disease. Investigation of the relationships between EH and the results of physiological examinations such as vestibular evoked myogenic potential, electrocochleography, and caloric response demonstrated that the results were related not only to the degree of EH, but also to the persistence and formation of EH. EH has also been detected in patients with superior canal dehiscence or large vestibular aqueduct syndrome. Moreover, we encountered a case in which EH was detected in the non-affected ear of a patient suffering from acute sensorineural hearing loss and disequilibrium, and such imaging analysis provided us with clues for treating her symptoms.