What Causes Williams Syndrome Symptoms?

Williams Syndrome is a rare genetic condition caused by a small deletion of genetic material from one copy of chromosome 7. This removes DNA coding for about 20 to 30 genes. As this deletion occurs randomly, there's nothing that any parent could do to prevent it happening. The fact that these genes are missing has many complex effects. The easiest to understand is the absence of the gene for elastin, a protein commonly found in blood vessels and many people affected by Williams Syndrome also show cardiovascular problems or narrowing of the arteries.child infant newborn new born