이석증과 유사한 원지성 안진을 보인 제4뇌실 종양

• Published in: Research in vestibular science pp. 84 - 88
• Main Authors: 전형원, 심예지, 박무균, 서명환
• Format: Journal Article
• Language: Korean
• Published: 대한평형의학회 01.09.2016
• Subjects: 신경과학
• ISSN: 2092-8882; 2093-5501

In some dizzy patients the apogeotropic direction changing positional nystagmus (DCPN) can be caused by a central disorder such as a mass lesion near the fourth ventricle or infaction. We have recently encountered a patient who showed a central DCPN mimicing a horizontal canal cupulolithiasis benign paroxysmal positional vertigo (BPPV). A 4.1 cm sized tumor was filling the fourth ventricle before the operation. When the head was turned to the left side vigorous right beting nystagmus was found. When the head was turned to the right side vigorous left beting nystagmus was found. But unlinke the typical horizontal canal BPPV, bowing and lying down position did not elicit any nystagmus. In order to see if the central DCPN was a transient finding or a persistent finding, we checked the nystagmus 3 weeks after the first testing. The same pattern of nystagmus was found again. The video head impulse test gain of all six canals were within the normal limit. In this article we discuss the points how to suspect a central DCPN in such cases.Res Vestib Sci 2016;15(3):84-88 KCI Citation Count: 0