Her diagnosis was uncovered after she began to experience severe leg pain.
The cause of this disorder is not known and there is no cure.
Nevertheless, she bounced back stronger than ever.
Prior to filming the Lifetime series, Sioux underwent months of physical therapy to regain her leg strength.
She was able to keep up with the rest of the dancers, despite what she went through.
After seven seasons and being the longest-running original cast member, Sioux chose to leave the series in 2017.
Since her exit, she has continued to thrive as a singer and actress.
