Medical breakthrough offers hope to people with same stiff person syndrome as Céline Dion

Some patients with autoimmune condition, taking part in trial, have been able to return to work and resume hobbies

Doctors have made a potentially significant breakthrough in the hunt for a treatment for stiff person syndrome, the autoimmune condition which affects the singer Céline Dion.

Stiff person syndrome (SPS) is a rare disease that attacks the central nervous system and can cause devastating rigidity throughout the body and painful muscle spasms. Despite decades of research, there is no cure.