Nail-patella syndrome is one of the few conditions where the genetic cause was nailed down decades ago — and yet, for most people living with it, that clarity has not translated into a genuinely useful roadmap.

Living with congenital contractural arachnodactyly — or CCA, sometimes called Beals syndrome — means navigating a condition that most physicians have never seen in clinical practice. The joint contractures, the elongated limbs, the curved spine, the unusually shaped ears: each of these features has a precise biological origin, rooted in a single gene and an entire signaling cascade that affects…