A patient was experiencing severe knee pain. Unfortunately, this wasn't anything new. For decades, he’d been suffering from joint disease, caused by severe bleeding in his knees from a rare blood disorder — hemophilia A. The patient was born in the 1960s, a time when the life expectancy for patients with hemophilia was only 10 years. But as Dr. Annette Von Drygalski, a board certified hematologist and the director of the Hemophilia and Thrombosis Treatment Centre at the University of California, San Diego, explains, advances in hemophilia treatment throughout this patient’s life allowed him — and many others like him — to live a longer, richer life.