 After the very successful summer of 1969, she began to experience pain in her left knee.X-rays showed a problem, Osteochondritis dissecans of the left femoral condyle, in which a part of the bone, was becoming detached from the femur.It was determined by her orthopedic surgeon Dr. Hector Gillespie, and her GP, sports medicine expert Dr. Doug Clement that surgery was needed to pin the loosened piece of bone in place.