title: Unusual caloric responses in a patient with a fourth ventricular ependymoma.
abstract: The caloric test is probably the most widely used clinical test of vestibular function. A unilateral decrease in response to cold and warm water reliably indicates a unilateral peripheral vestibular lesion. Central signs on caloric testing are less common but important to recognize because they are often associated with lesions of the brainstem. We describe a patient with a tumor originating in the floor of the fourth ventricle who presented with premature reversal after cold stimulation on one side and perverted nystagmus after cold stimulation of the other side.
authors.affiliation: Department of Neurology, Keimyung University School of Medicine, 194 Dongsan dong, Daegu 700-712, South Korea.
authors.forename: Hyun-Ah
authors.initials: HA
authors.lastname: Kim
authors.forename: Hyung
authors.initials: H
authors.lastname: Lee
authors.forename: Hyon-Ah
authors.initials: HA
authors.lastname: Yi
authors.forename: Robert W
authors.initials: RW
authors.lastname: Baloh
mesh_terms: D002150:Caloric Tests; D002551:Cerebral Ventricle Neoplasms / Q000150:complications*; D004584:Electronystagmography; D004806:Ependymoma / Q000150:complications*; D005260:Female; D020546:Fourth Ventricle / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D015837:Vestibular Diseases / Q000175:diagnosis* / Q000209:etiology*; D055815:Young Adult