Stiff Person Syndrome is a rare disorder that causes painful muscle spasms and stiffness . It can be caused by an injury or disease, but it's most common in people who have had surgery to remove part of the spine ( such as a spinal fusion ). Stem cell transplantation may successfully treat this debilitating disease .
Stiff Person Syndrome is a rare disorder that causes painful muscle spasms and stiffness . Experts estimate one in every 1 million people has SPS . Stem cell transplantation may successfully treat this debilitating disease .