Stiff person syndrome — a condition that has caused Celine Dion to cancel her tour — is a rare neurological condition that can take years to diagnose and tailor treatment.

Two people who are living with stiff person syndrome — a rare neurological disorder that causes muscle rigidity and spasms — shared with Fox News Digital what their experience has been like.

Stiff person syndrome, or SPS, is a rare "neurological disorder with features of an autoimmune disease," the National Institute of Neurological Disorders and Stroke notes.

Stiff person syndrome often begins with stiffness in the torso and abdomen, which can then spread to the legs, arms and face, Dr. Tankha said. At first, ...

Stiff person syndrome treatment “The goal of treatment is symptoms and mobility improvement,” says Nizar Souayah, M.D., a neurology professor at Rutgers New Jersey Medical School.

Stiff-person syndrome is both serious and rare — estimates say it occurs in one out of every million people. Because it's so uncommon, the disorder can also be misdiagnosed, leading to a delay ...

Stiff Person Syndrome Causes. Doctors haven’t yet pinpointed an exact cause of stiff person syndrome. They do know, though, that most people with SPS have antibodies that target an enzyme called ...

Patients with stiff person syndrome are one step closer to having access to a new treatment. Kyverna Therapeutics’ new drug, KYV-101, has been designated by the U.S. Food and Drug Administration ...

Stiff person syndrome is a neurological disease and autoimmune disorder. SPS affects your brain and spinal cord. It’s a rare condition that can severely impact your life. Learn about the ...

Stiff person syndrome — a condition that has caused Celine Dion to cancel her tour — is a rare neurological condition that can take years to diagnose and tailor treatment.