<unk>  Cerebellar ataxia is a diagnosis of exclusion. Urgent CT scan is necessary to rule out cerebellar tumor or hemorrhage as cause of the ataxia; however in<unk>  cerebellar ataxia, the CT will be normal. CSF studies are normal earlier in the course of disease. Later on CSF shows moderate elevation of proteins. Differential diagnosis * Brain tumors, including cerebellar astrocytoma, medulloblastoma, neuroblastoma * Cerebellar contusion * Subdural hematoma * Toxins, including ethanol or anticonvulsants * Cerebellar infarction or hemorrhage * Meningitis * Encephalitis *<unk>  disseminated encephalomyelitis * Multiple sclerosis
Acute cerebellar ataxia of childhood
Post viral cerebellar ataxia
Encephalitis lethargica
Alternating hemiplegia of childhood
Bickerstaff brainstem encephalitis
Post-encephalitic parkinsonism
Juvenile primary lateral sclerosis
Chronic paroxysmal hemicrania