“Williams syndrome (WS) is a genetic condition that is present at birth and can affect anyone. It is characterized by medical problems, including cardiovascular disease, developmental delays, and learning challenges. These often occur side by side with striking verbal abilities, highly social personalities, and an affinity for music. WS occurs equally in males and females and in all cultures worldwide. Williams syndrome is caused by the spontaneous deletion of 26-28 genes on chromosome #7 at the time of conception. The deletion can occur in either the egg or the sperm. It is likely that in most families, the child with Williams syndrome is the only one to have the elastin gene condition in his or her entire extended family. There are two DNA tests that can determine if a person has Williams syndrome. The FISH test and the Microarray.”

William Syndrome (https://williams-syndrome.org/what-is-ws)