A rare genetic condition brings with it an unforgettable personality. June 9, 2011 — -- Williams Syndrome is a rare genetic condition -- so rare, in fact, that few people have ever heard of it.

Individuals with the neurodevelopmental disorder Williams syndrome have a gregarious "cocktail party" personality, while those with the opposite genetic alteration, in contrast, tend to have autistic ...

A new specialty center opened Tuesday at the Hospital of the University of Pennsylvania in Philadelphia. It's one of the first in the country to help children and adults with Williams syndrome, a rare ...