Williams Disease What Is The Disease Of Children That Makes Them Grow Older 4x Faster?

What is the disease of children that makes them grow older 4x faster? - williams disease

What is called the condition? It's like a Robin Williams has in his movie "Jack". Only it's not as if the person will grow, and as an adult. The person physiologically, as in, the folds and diseases such as hypertension, make, etc., which are usually adults, people with congenital disorders or those who do not live more healthy.