This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Spinocerebellar ataxia type 11 (SCA11) is characterized by progressive cerebellar ataxia (difficulty walking and balance) and abnormal eye signs (jerky pursuit, horizontal and vertical movements (nystagmus), pyramidal features (increased muscular tonus, increased reflexes and an abnormal reflex known as Babinski sign and inability to make to perform fine movements), peripheral neuropathy with numbness, weakness or pain in the feet or hands or other places of the body and dystonia. It is a very rare disease and very few patients have been reported to date. Age of onset ranges from the early teens to the mid 20s and life span is normal. Diagnosis is based on signs and symptoms and is confirmed by genetic testing finding a change (mutation) in the TTBK2 gene. It is inherited in an autosomal dominant manner. Treatment may include speech and language therapy for talking and swallowing problems, occupational therapy, including home adaptations, physiotherapy and use of assistive walking devices and ankle-foot orthotics (AFOs) for those with neuropathy.
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