Abstract
On March 3, 2005, a 28-year-old woman consulted our hospital complaining of truncal ataxia and disequilibrium. She had experienced a common cold at the end of January. Since she could not stand alone due to severe truncal ataxia, she was hospitalized. Electronystagmography including eye tracking test, optokintic nystagmus pattern test and caloric test showed normal results. Flutter-like oscillations of the eyes appeared when she changed her eye position. Finger-to-nose test results were showed normal. There were no apparent intracranial lesions on MR imaging. She was diagnosed as having acute cerebellitis, because cerebellar symptoms had occurred after a common cold. Her symptoms were medicated and subsequently showed improvement on March 31. It was suggested that cerebellitis was limited within the fastigial nucleus and the anterior to middle portion of vermis in this case.
