''According to information from Johns Hopkins Medicine in the United States, stiff-person syndrome is a very rare condition that most often affects patients in

''According to information from Johns Hopkins Medicine in the United States, stiff-person syndrome is a very rare condition that most often affects patients in the lower back, abdominal and leg areas, which can affect a person's gait and balance, leaving them susceptible to falls.'' https://www.cbc.ca/news/entertainment/celine-dion-neurological-disease-1.6678417 https://www.cbc.ca/news/entertainment/celine-dion-neurologic...