Positional vertigo with cerebellar astrocytoma.
The authors present two surgically verified cases of cerebellar astrocytoma extending into the fourth ventricular floor. Each patient presented with positional vertigo, and electronystagmography revealed positional nystagmus indicative of a central lesion. The findings in these cases emphasize the need of looking for positional nystagmus in patients with suspected posterior fossa lesions.
D000293:Adolescent; D001254:Astrocytoma / Q000150:complications* / Q000175:diagnosis; D002528:Cerebellar Neoplasms / Q000150:complications* / Q000175:diagnosis; D004584:Electronystagmography; D005260:Female; D006801:Humans; D009759:Nystagmus, Pathologic / Q000209:etiology; D014717:Vertigo / Q000209:etiology*