Celine Dion’s Sister Claims Singer Has Lost Control Of Muscles In Stiff-Person Syndrome Battle

A devastating update on Celine Dion‘s debilitating battle with Stiff-Person Syndrome … as her sister says she’s lost control of her muscles.

The star’s sister, Claudette Dion, revealed the shocking turn in her disease which causes painful muscle spasms, saying it would be a while before Celine returns to the stage.

She told 7 Jours it broke her heart ’cause her sister had always been disciplined and hard-working … recalling their late mother telling Celine her habits would make her successful — but that very success now appears threatened.

Despite the grim outlook, Claudette says it’s still Celine’s goal to return to the stage — but in what capacity, she doesn’t know.

Research into the neurological disorder is still ongoing … but because it’s so rare, it means progress is slow — which Claudette can’t wrap her head around … adding that many people in the same boat have “lost hope” of a cure ever being found.

The update comes after she told HELLO! Canada in Sept that Celine was “doing everything” in her power to recover … but her spasms were impossible to control.

The “All By Myself’ singer announced she was stricken with the disease in a December 2022 video message … forcing her to cancel a bunch of her 2023 concert dates.

3 ½ years after last being seen in public, Celine was spotted last month at a hockey game between the Vegas Golden Knights and her hometown Montreal Canadiens — looking in good spirits despite her health woes.