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7 Years

On average, it takes 7 years to be diagnosed with SPS.

4-5 per 1MM

SPS affects 4-5 people out of a million.

Age 30-50

Age when symptoms most commonly develop.

5% of cases

Percentage of SPS cases reported in children.

Join the Fight to End SPS

Stiff Person Syndrome (SPS) is a neurological disease with autoimmune features. Usually progressive over time, SPS symptoms include severe muscle spasms, rigid limbs and body, debilitating pain, and chronic anxiety. 

We're on a mission to END SPS!

Our Mission

The Stiff Person Syndrome Research Foundation envisions a world where all people with Stiff Person Syndrome (SPS) receive a prompt diagnosis, compassionate care, effective treatments, and a cure.

We exist to raise awareness of SPS and to support research for better treatments and a cure for SPS while strengthening our community through education and collaboration.

Providing Hope for SPS Patients


SPS is labeled as a rare

disease. However more people are likely affected than reported due to


The SPS Global Registry

The SPS Global  Registry and Natural History Study will improve our understanding of SPS.

 SPS Diagnostic Criteria

This initiative will develop a clear definition of the

required criteria to

diagnose SPS and its


SPS Publications
& Literature

From symptoms to

diagnosis, from treatment to living with SPS, these are the latest resources you need.

Proudly Recognized By:

Get Involved 

Join us in making a difference in the lives of those affected by Stiff Person Syndrome. Your involvement, whether through volunteering, donating, or spreading awareness, plays a crucial role in advancing research and finding a cure.


Participate in the SPS Global Registry & Natural History Study.


Host an SPSRF fundraiser  to support our mission.


Share your SPS

journey with the



Sign-up for to get the latest news about The SPSRF.

Support The SPSRF 

Support our mission to find a treatment and, ultimately, a cure for Stiff Person Syndrome by donating through our website.


Every donation directly contributes to advancing research, improving patient care, and providing hope to those affected by SPS.

The SPSRF Media Center

Image by National Cancer Institute


The New England Journal of Medicine recently featured a two-part case study on SPS, a significant step in disseminating information widely across the medical community.

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