Positional nystagmus: an early sign in medulloblastoma.
D000293:Adolescent; D001932:Brain Neoplasms / Q000150:complications / Q000175:diagnosis*; D002648:Child; D005260:Female; D006801:Humans; D008527:Medulloblastoma / Q000150:complications / Q000175:diagnosis*; D009460:Neurologic Examination; D009461:Neurologic Manifestations; D009759:Nystagmus, Pathologic / Q000209:etiology*