article_snippet: Jade suffered from Rett Syndrome, a rare disorder which only affects girls and impacts on breathing and movement and is usually caused by a spontaneous genetic mutation . '
article_snippet: Rett Syndrome is a rare chromosome condition that only affects girls.
article_snippet: Most girls with Rett syndrome reach adulthood but lose Most girls with Rett syndrome motor skills.
article_snippet: Rett Syndrome is most often caused by a spontaneous genetic mutation and can occur in any family at any time.
article_snippet: Rett Syndrome affects around 1 in 12,000 live female births.
article_snippet: People do not die of Rett Syndrome but of complications that can appear with Rett Syndrome such as epilepsy or pneumonia .