| Main features described as late-onset and slowly progressive gait ataxia and other cerebellar signs such as impaired muscle coordination and nystagmus. The mean age of onset is 45 years but can range from the ages of 16 to 72 years. It usually presents with the cerebellar signs of ataxia and dysarthria as well as dysphagia. Some patients also have episodic vertigo and diplopia. Parkinsonism, dystonia, myoclonus, tremor and cognitive impairment have been reported in rare cases. |
