Spinocerebellar Ataxia Type 15: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Spinocerebellar Ataxia Type 15?
A neurologist, a doctor who treats diseases of the brain and nerves, usually manages this condition. Physical, speech, and occupational therapists are also part of the care team. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What it is
Spinocerebellar ataxia type 15 is a rare genetic disease affecting the cerebellum, the part of the brain that controls balance and movement. Ataxia means loss of muscle coordination. People with this condition slowly lose the ability to move smoothly and keep their balance. It is one of many related conditions called spinocerebellar ataxias.
Symptoms
The main symptom is trouble with balance and walking. People may sway, stagger, or feel unsteady. Many develop shaky eye movements called nystagmus. Some have trouble speaking clearly, and hand movements can become clumsy. Symptoms usually begin between ages 30 and 50 and worsen slowly over many years.
Causes and who gets it
This condition is caused by a mutation in a gene known as ITPR1. One copy of the changed gene is enough to cause the disease, so it can be passed from a parent. This autosomal dominant pattern gives each child a one in two chance of getting it.
How doctors diagnose it
Doctors start with a physical exam and a history of symptoms. An MRI scan can show whether the cerebellum is smaller than normal. Genetic testing, a blood or saliva test, can confirm the diagnosis.
Treatment
There is no cure, and no medicine has been proven to stop it from getting worse. Treatment focuses on helping people stay active and independent. Physical therapy can improve balance and strength, occupational therapy teaches new ways to handle daily tasks, and speech therapy can help with speaking and swallowing. Canes, walkers, or handrails can lower the risk of falls.
When to see a doctor
Anyone with ongoing unsteadiness, frequent falls, slurred speech, or unusual eye movements should see a doctor, as should anyone with balance problems in the family. Early evaluation helps rule out treatable causes.
How a direct primary care or concierge doctor fits in
A direct primary care doctor is paid a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works with insurance. Either one can watch symptoms, order tests, and refer the patient to a neurologist when needed.
Common questions
Is spinocerebellar ataxia type 15 fatal?
It is a serious, lifelong condition, but it usually progresses slowly over decades. Many people live into older age with it. Doctors focus on keeping people mobile and safe as it changes.
Can it be passed to my children?
Yes, it can be. Because it is autosomal dominant, each child of a person with the changed gene has a one in two chance of inheriting it. A genetic counselor can explain this in more detail.
Will a wheelchair be needed?
Some people eventually need a cane, walker, or wheelchair. Others keep walking with support for many years. The pace of change varies a lot from person to person. Regular therapy may help people stay mobile longer.
Is there a test before symptoms start?
Genetic testing can find the changed gene even before symptoms appear. Some people choose testing to plan ahead, while others prefer not to know. A genetic counselor can help a person decide what is right for them.
Sources
- NIH Genetic and Rare Diseases Information Center - Spinocerebellar ataxia type 15/16
- National Institute of Neurological Disorders and Stroke - Spinocerebellar Ataxias
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
