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.

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 ...

Christopher Knight is bringing smiles to families across the country with a heartwarming new documentary. Williams Syndrome, first identified by researchers in 1961, is a rare genetic condition that ...