What is stiff-person syndrome? Celine Dion reveals rare condition.

Key Facts

• Celine Dion announced that she was diagnosed with a rare and incurable neurological condition known as stiff-person syndrome, and that she will cancel or postpone dozens of shows in her “Courage World Tour.”
• In an emotional, five-minute Instagram video posted Thursday, Dion, 54, told fans: “I’ve been dealing with problems with my health for a long time, and it’s been really difficult for me to face these challenges and to talk about everything that I’ve been going through.”
• What is stiff-person syndrome?
• We spoke with neurologists and a pain specialist to answer common questions about the unusual disorder, including how it’s diagnosed and whether it affects longevity.

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