Penn and CHOP open a center for a rare genetic condition, thanks to a $25 million donation

Michael Armellino first heard of Williams syndrome when his partner’s granddaughter, Maelyn, was born with the rare genetic condition 10 years ago. A simple internet search laid out that she could be at risk of heart disease and almost certainly would have developmental delays. But it didn’t prepare him for meeting her. Maelyn’s big smiles and effusive “I love you’s” — a hallmark of Williams ...